learn more at altairhyperworksblog.altair.co.kr/wp-content/uploads/2018/07/hwsolvers... ·...

Learn more at altairhyperworks.com

Intellectual Property Rights Notice: Copyrights, Trademarks, Trade Secrets, Patents & Third Party Software Licenses

HyperWorks Solvers 2017.2.4 A Platform for Innovation™ Altair Engineering, Inc. Copyright© 1986-2018. All Rights Reserved.

HyperWorks® products: HyperMesh® ©1990-2018; HyperCrash® ©2001-2018; OptiStruct® ©1996-2018; RADIOSS® ©1986-2018; HyperView® ©1999-2018; HyperView Player® ©2001-2018; HyperMath® ©2007-2017; HyperStudy® ©1999-2018; HyperGraph® ©1995-2018; MotionView® ©1993-2018; MotionSolve® ©2002-2018; HyperForm® ©1998-2018; HyperXtrude® ©1999- 2018; Process Manager™ ©2003-2018; Templex™ ©1990-2018; TextView™ ©1996-2018; MediaView™ ©1999-2018; TableView™ ©2013-2018; BatchMesher™ ©2003-2018; HyperWeld® ©2009-2018; HyperMold® ©2009-2018; Manufacturing Solutions™ ©2005-2018; solidThinking Inspire® 2018 ©2009-2017; solidThinking Evolve®2017 ©1993-2017; Durability Director™ ©2009-2018; Suspension Director™ ©2009-2018; AcuSolve® ©1997-2018; AcuConsole® ©2006-2018; SimLab® ©2004-2018; Virtual Wind Tunnel™ ©2012-2018; FEKO® (©1999-2014 Altair Development S.A. (Pty) Ltd.; ©2014-2018 Altair Engineering, Inc.); ConnectMe™ ©2014-2018; Click2Extrude™ Polymer 2017 ©1996-2017; Click2Extrude™ Metal 2017 ©1996-2017; Click2Form™ 2017 ©1998-2018; FLUX 2018 © 1983-2018, FluxMotor 2018 © v2017-2018; WinProp v.2018 ©2000-2018.

Additional Altair Products: Multiscale Designer™ ©2011-2017 ESAComp v.4.7 ©1992-2018

Altair Packaged Solution Offerings (PSOs): Automated Reporting Director™ ©2008-2018; GeoMechanics Director ©2011-2018; Impact Simulation Director™ ©2010-2018; Model Mesher Director™ ©2010-2018; NVH Director™ ©2010-2017; Squeak and Rattle Director™ ©2012-2018; Virtual Gauge Director™ ©2012-2018; Weight Analytics™ ©2013-2017; Weld Certification Director™ ©2014-2018; Multi-Disciplinary Optimization Director™ ©2012-2018.

Altair Simulation Cloud Suite: Simulation Manager™ ©2003-2018; Compute Manager™ ©2003-2017; Display Manager™ ©2003–2017; and Process Manager™ ©2003-2018.

Altair PBS Works™: PBS Professional® ©1994-2018; PBS Control™ © 2008-2018; PBS Access™ © 2008- 2018; Compute Manager™ ©2012-2017; Display Manager™ ©2013-2017; PBS Pro™ ©1994-2017; PBS Application Services™ ©2008-2017; PBS Analytics™ ©2008-2017; PBS Desktop™ ©2008-2012; and e-Compute™ ©2000-2010.

Runtime 2017 © 1995 – 2018

Special Notice: Pre-release versions of Altair software are provided ‘as is’, without warranty of any kind. Usage of pre-release versions is strictly limited to non-production purposes.

solidThinking Inspire® 2018 ©2009-2018; solidThinking Evolve®2017 ©1993-2018; solidThinking Compose® 2018 ©2007-2018, solidThinking Activate® 2018 ©1989-2018, solidThinking Embed® 2018 ©1989-2018, solidThinking Embed® SE 2018 ©1989-2018; Click2Extrude® Metal 2018 ©1996-2018; Click2Extrude® Polymer 2018 ©1996-2018; Click2Cast® 4.1 ©2011-2018; Click2Form™ 2018 ©1998-2018; Envision® 4.0 ©2013-2017.

Altair intellectual property rights are protected under U.S. and international laws and treaties. Additionally, Altair software is protected under patent #6,859,792 and other patents pending. All other marks are the property of their respective owners.

ALTAIR ENGINEERING INC. Proprietary and Confidential. Contains Trade Secret Information.

Not for use or disclosure outside of Altair and its licensed clients. Information contained in Altair software shall not be decompiled, disassembled, “unlocked”, reverse translated, reverse engineered, or publicly displayed or publicly performed in any manner. Usage of the software is only as explicitly permitted in the end user software license agreement. Copyright notice does not imply publication.

Third party software licenses

AcuConsole contains material licensed from Intelligent Light (www.ilight.com) and used by permission.

Software Security Measures:

Altair Engineering Inc. and its subsidiaries and affiliates reserve the right to embed software security mechanisms in the Software for the purpose of detecting the installation and/or use of illegal copies of the Software. The Software may collect and transmit non-proprietary data about those illegal copies. Data collected will not include any customer data created by or used in connection with the Software and will not be provided to any third party, except as may be required by law or legal process or to enforce our rights with respect to the use of any illegal copies of the Software. By using the Software, each user consents to such detection and collection of data, as well as its transmission and use if an illegal copy of the Software is detected. No steps may be taken to avoid or detect the purpose of any such security mechanisms.

Technical Support

Altair provides comprehensive software support via web FAQs, tutorials, training classes, telephone, and e-mail.

Altair Support on the World Wide Web

The Altair web site is a valuable online companion to Altair software. Visit www.altairhyperworks.com for tips and tricks, training course schedules, training/tutorial videos, and other useful information.

Altair Training Classes

Altair training courses provide a hands-on introduction to our products, focusing on overall functionality. Courses are conducted at our main and regional offices or at your facility. If you are interested in training at your facility, please contact your account manager for more details. If you do not know who your account manager is, please send an e-mail to [email protected] and your account manager will contact you.

Telephone and e-mail

When contacting Altair support, please specify the product and version number you are using along with a detailed description of the problem. Many times, it is very beneficial for the support engineer to know what type of workstation, operating system, RAM, and graphics board you have, so please have that information ready. If you send an e-mail, please specify the workstation type, operating system, RAM, and graphics board information in the e-mail.

To contact an Altair support representative, reference the following table or the information available on the HyperWorks website:

http://www.altairhyperworks.com/ClientCenterHWSupportProduct.aspx

Location Telephone e-mail

Australia 64.9.413.7981 [email protected]

Brazil 55.11.3884.0414 [email protected]

Canada 416.447.6463 [email protected]

China 86.400.619.6186 [email protected]

France 33.1.4133.0992 [email protected]

Germany 49.7031.6208.22 [email protected]

India 91.80.6629.4500 1.800.425.0234 (toll free)

[email protected]

Italy 39.800.905.595 [email protected]

Japan 81.3.5396.2881 [email protected]

Korea 82.70.4050.9200 [email protected]

Mexico 55.56.58.68.08 [email protected]

http://www.altairhyperworks.com/

mailto:[email protected]

http://www.altairhyperworks.com/ClientCenterHWSupportProduct.aspx












New Zealand 64.9.413.7981 [email protected]

North America 248.614.2425 [email protected]

Scandinavia 46.46.460.2828 [email protected]

Spain 34.910.810.080 [email protected]

South Africa 27.21.8311500 [email protected]

United Kingdom 01926.468.600 [email protected]

For questions or comments about this help system, send an email to [email protected].

In addition, the following countries have resellers for Altair Engineering: Colombia, Czech Republic, Ecuador, Israel, Russia, Netherlands, Turkey, Poland, Singapore, Vietnam, Indonesia

Official offices with resellers: Canada, China, France, Germany, India, Malaysia, Italy, Japan, Korea, Spain, Taiwan, United Kingdom, USA

See www.altair.com for complete contact information.








http://www.altair.com/

Contents

HyperWorks Solvers 2017.2.4 Release Notes........................................................... 2

RADIOSS 2017.2.4 Release Notes....................................................................................... 3OptiStruct 2017.2.4 Release Notes......................................................................................5

HyperWorks Solvers 2017.2.3 Release Notes........................................................... 6

RADIOSS 2017.2.3 Release Notes....................................................................................... 7OptiStruct 2017.2.3 Release Notes......................................................................................9MotionSolve 2017.2.3 Release Notes................................................................................. 15

HyperWorks Solvers 2017.2.2 Release Notes......................................................... 18

RADIOSS 2017.2.2 Release Notes..................................................................................... 19OptiStruct 2017.2.2 Release Notes.................................................................................... 21MotionSolve 2017.2.2 Release Notes................................................................................. 27

HyperWorks Solvers 2017.2.1 Release Notes......................................................... 28

OptiStruct 2017.2.1 Release Notes.................................................................................... 29

HyperWorks Solvers 2017.2 Release Notes.............................................................33

RADIOSS 2017.2 Release Notes........................................................................................ 34

1

HyperWorks Solvers 2017.2.4Release Notes 1

HyperWorks Solvers 2017.2.4 Release Notes

This chapter covers the following:

• RADIOSS 2017.2.4 Release Notes (p. 3)

• OptiStruct 2017.2.4 Release Notes (p. 5)

HyperWorks Solvers Release NotesHyperWorks Solvers 2017.2.4 Release Notes p.3

RADIOSS 2017.2.4 Release NotesView new features for RADIOSS 2017.2.4.

HighlightsVersion 2017.2.4 of RADIOSS fixes critical issues detected in 2017.2.3 release and includes someenhancements.

Finite Volume Airbag (/MONVOL/FVMBAG1)• Reduction of the starter time for the automatic FVM airbag meshing.

• On win64 machines, behavior improvement of automatic FVM airbag meshing.

• Automatic setting of DTBAG and NFV in /TH/MONV when FVMBAG1 airbag is defined in the model.

• Implementation of heat transfer option in case of airbag temperature is lower than the ambienttemperature.

Failure Model /FAIL/TAB1• Correction of an issue with strain rate dependent instability table.

• New integer flag for selecting the instability or fracture regularization method located in card 4 field10.

Ch_i_f, Flag for choice of instability or fracture regularization.

= 1 (Default): Element length regularization affects the fracture curve

= 2: Element length regularization affects the instability table

= 3: Element length regularization affects both fracture curve and instability table

Material /MAT/LAW19 (FABRI)• Stability improvement for QEPH and BATOZ shell elements in /PROP/TYPE9 (SH_ORTH).

• To improve stability, the minimum value of the reduction factor RE is 0.001.

Note: Material stiffness may change in models with a very small RE values or with differentshear modulus values between directions.

Resolved Issues/INIBRI/STRS_F

Improvement to take into account multiple values coming from /INIBRI/STRS_F cards and other /INIBRI cards (strain and aux) in the same element.

/DT/THERMCorrection of bug concerning thermal time step and de-blocking limit conditions at the end ofthermal run.

//SUBMODELIssue with /INISHE/ORTH_LOC and /MONVOL/AIRBAG1.

Proprietary Information of Altair Engineering


/ADMAS with type = 3, 4, 6, 7Important correction and improvement of the mass distribution.

Note: Total mass and total inertia of the model is expected to change if these optionswere used in the model.

/INTER/TYPE23Corrected starter crashes caused by the location of the contact definition in the input model.

/BOX/BOXCorrected starter crashes for the surface defined with the option /BOX/BOX.



OptiStruct 2017.2.4 Release NotesWhat's new and changed in OptiStruct 2017.2.4.

Altair OptiStruct is an industry proven, modern structural analysis solver for linear and non-linearmechanical problems under static, dynamic, and thermal loads. It is the market-leading solution forstructural design and optimization. Based on finite-element and multibody dynamics technology, andthrough advanced analysis and optimization algorithms, OptiStruct helps designers and engineersrapidly develop innovative, lightweight and structurally efficient designs. OptiStruct is used bythousands of companies worldwide to analyze and optimize structures and mechanical systems forstrength, durability, noise and vibrations, heat transfer, as well as impact.

2017.2.4 is a bug fix release for OptiStruct. The following issues are fixed in 2017.2.4.

Modal Frequency results could be wrong when the following conditions are met:

• Viscous damping elements (CDAMP, CVISC, CBUSH)

• AMLS or Lanczos

• PARAM,FASTFR or PARAM,FFR is not used

Approximation error from multi-axial fatigue optimization







• MotionSolve 2017.2.3 Release Notes (p. 15)


RADIOSS 2017.2.3 Release NotesView new features for RADIOSS 2017.2.3.

HighlightsVersion 2017.2.3 of RADIOSS fixes critical issues detected in 2017.2.2 release and includes someenhancements.

Finite Volume Airbag (/MONVOL/FVMBAG1)• New automatic FVM meshing method (kmesh=2) using external tetrahedron mesh libraries

◦ The tetrahedron meshing is performed in the Starter

◦ These libraries are provided on the install packages

• Automatic switch from Finite Volume Method to Uniform pressure

◦ The switch is activated at a specified time, Tswitch

◦ Or when only 1 finite volume remains

• Improvement of the initial velocity for the internal node of the finite volume mesh

• New option in the flag Iequi in order to reduce CPU cost

◦ With Iequi=1, RADIOSS performs simplified FVM Simulation before TTF to provide gas dynamicequilibrium inside of the airbag each cycle.

Time Step Control• /DT/INTER/AMS: compatibility with /DT/NODA and /DT/NODA/CST

• /DT/NODA/CST and /DT/INTER/CST: Enhancement of the constant nodal time step treatment

◦ /DT/NODA/CST1 or /DT/INTER/CST1 = same as /DT/NODA/CST or /DT/INTER/CST (default)

◦ /DT/NODA/CST2 or /DT/INTER/CST2 = improved formulation. The computation starts directlyfrom the target time step and it remains most often constant during the computation. The totalmass added in the model should be lower.

Contact Interface• /INTER/TYPE24: node to surface contact with edge treatment

◦ Stability improvement in double and single precision

◦ Behavior improvement with the Iedge and Idel options.

• /INTER/TYPE2: tied contact

◦ If all the slave nodes are removed from the tied interface due to the project issues and theIgnore flag setting, the starter will delete the contact to avoid issue during the computation

◦ Result improvement with the option /PARITH/ON.

◦ Stability improvement with single precision and global time step (/DT/GTS).

Materials• /MAT/LAW5 (JWL): Pressure shift and initial pressure options



◦ The ability to define a pressure shift and initial pressure was added to LAW5.

Documentation• Update of the modified keywords:

◦ /MONVOL/FVMBAG1

◦ /DT/NODA/CST

◦ /MAT/LAW5

• Correction and improvement of the overall documentation

Resolved Issues• /ALE/GRID/SPRING: improvement of the input deck reading and starter listing message

• /ALE/GRID/STANDARD: improvement of the input deck reading and starter listing message

• /MAT/LAW42 (OGDEN): stability issue for the material using viscous parameter (Prony serie) directlydefined into the material law.

• /MAT/LAW70 (FOAM_TAB)

◦ Improvement of the unloading behavior for the formulation Iflag=0

◦ Stability improvement with the quadratic tetrahedron element (/TETRA10)

• /MAT/LAW93 (ORTH_HILL): now compatible with /PROP/TYPE51 and /PROP/PCOMPP

• /PROP/KJOINT2: improvement of the specific energy computation

• /PROP/TYPE17 (STACK): now compatible with /INISHE/ORTH_LOC and /INISH3/ORTH_LOC

• /PROP/TYPE14 (SOLID)

◦ Improvement of the computation stability with the solid 2 SPH option and the material /MAT/LAW24 (CONC).

• /RWALL/PARAL: parallelogram rigid wall

◦ Improved behavior in single precision computation. Slave nodes could remain attached to thewall after impact.




HighlightsAltair OptiStruct is an industry proven, modern structural analysis solver for linear and non-linearmechanical problems under static, dynamic, and thermal loads. It is the market-leading solution forstructural design and optimization. Based on finite-element and multibody dynamics technology, andthrough advanced analysis and optimization algorithms, OptiStruct helps designers and engineersrapidly develop innovative, lightweight and structurally efficient designs. OptiStruct is used bythousands of companies worldwide to analyze and optimize structures and mechanical systems forstrength, durability, noise and vibrations, heat transfer, as well as impact.

The major items for the OptiStruct release are:

• Stabilization in Nonlinear Static Analysis

• Energy output for Small Displacement Nonlinear Analysis

• Contact pressure optimization response

• Gasket pressure optimization response

Stiffness, Strength and StabilityStabilization

Static stabilization can be activated in nonlinear static analysis thru NLADAPT, STABILIZ.Stabilization could help if the problem becomes unstable due to local buckling. The stabilizationcomes from the mass (if the density is not defined, an artificial mass is calculated based on unitdensity) and the velocity.

Energy output for Small Displacement Nonlinear AnalysisEnergy output is now supported for small displacement nonlinear analysis. Contact Stabilizationand the static stabilization, the strain energy of the model will be output in the e.nlm file if NLOUTis defined in case control/subcase section.

DMIG with large rotationsDMIGs can now undergo large rotations when the new DMIGROT Bulk Data Entry is utilized.

Noise and VibrationsEnhanced PARAM,AMSE4EFM support

PARAM,AMSE4EFM is now supported for frequency-dependent material (MATF#) and frequency-dependent bushing (PBUSHT).

Thermal Analysis• Composites (PCOMP(G)/PCOMPP) are now supported for Nonlinear Heat Transfer Analysis.

Composites• Gasket pressure optimization response



DRESP1 ID LABEL RTYPE PTYPE REGION ATTA ATTB ATTi

DRESP1 “ID#” “Label” GSKP “PGASKID”

PRES “PGASKID”

• CGAP force optimization response


DRESP1 “ID#” “Label” FORCE ELEM FAX “CGAPelem ID”

• CFAST force optimization response


DRESP1 “ID#” “Label” FORCE ELEM FXF, FYF,or FZF

“CFASTelem ID”

• Solid corner stress response for topology optimization


DRESP1 “ID#” “Label” STRESS PSOLID “StressItemCode”

CORNER “PSOLIDID”

• Grid point stress response for topology optimization


DRESP1 “ID#” “Label” GPSTR PSOLID “StressItemCode”

“PSOLIDID”

• Response spectrum optimization

RSDISP response for size. shape and topology optimization.

The TX, TY, TZ, RX, RY, RZ displacement item codes are supported for the ATTA field for RSDISP.




DRESP1 “ID#” “Label” RSDISP ResponseSpectrumDisplacementComponent

“Grid ID”

RSSTRESS response for size and shape optimization.

For ROD, BEAM, and BAR elements, all static stress item codes are available for RSSTRESS ATTAfield. For Shells and Solid elements, similarly static stress item codes are supported, except forSurface Stress (von Mises, Max Principal, and Minor Principal stresses), and Neuber correction (1,2).


DRESP1 “ID#” “Label” RSSTRESS “PTYPE orELEM”

ResponseSpectrumStressComponent

“PTYPE orELEM ID”

• Neuber optimization response in nonlinear subcase

Neuber optimization response was not available in NLSTAT subcase. This is now supported.


DRESP1 “ID#” “Label” STRESS “PTYPE” NEUB “PTYPEID”

• Sensitivity Output for 1D Topology

OUTPUT,H3DTOPOL is now supported for 1D Topology.

• Optimization with Local Centrifugal Force loading

Optimization is now supported for centrifugal force (RFORCE) for a set of elements (IDRF).

• DDM support for MMO

The number of DDM MPI cores for each model can be specified in the main MMO input file.

ASSIGN, MMO, Label, filename, <number of DDM cores>

Underlying Elemental Responses Output in .out File for NORM Response

The top N contributions (element ID, response value, constraint violation) are printed for eachnorm response below the norm response itself. This is controlled by PARAM,PRTNORM,N and thedefault value is 10.



• DRESPONSE output when more than one grids/elemental responses are involved in DRESP2/DRESP3

Each grid/element involved in the response is now given a value corresponding to the totalresponse, and an unlimited number of nested DRESP2/3 responses is supported.

General Updates• Filter option for DISPLACEMENT output request

Filter options (TM,T1/2/3 for translation and TR, R1/2/3 for rotation) are now supported fordisplacement output for static and buckling subcases. H3D and punch files are supported. Only theresults that satisfy the filtering criteria will be output in order to reduce the file size.

• Material damping definition from each ply

Prior to this release, damping was only supported via GE specified on PCOMP(G) and PCOMPP.New string entry “USEMAT” is now available as an option for the GE field on above mentionedproperties and once this is set, the damping specified on material card for each of the plies and thecorresponding thickness will be used to form the damping matrices.

• Property/Component based energy output (strain energy and strain energy density)

group argument (PROP/COMP or BYPROP/BYCOMP) has been supported for static, eigenvalue,frequency response and transient analysis for ESE, EKE, and EDE entries. This is for H3D and punchfiles. GROUP energy is available under Element Energy Results Type in the H3D file. In punch files,the prop IDs/comp IDs and the energy and corresponding energy density are available.

With PROP(or BYPROP) and COMP(or BYCOMP), the elemental energies are also output. If onlyGROUP strain energy is needed, OPROP/OCOMP options for the group argument should be used.

• Automatically fix invalid RBE3

PARAM,FIXRBE3,YES is now available to automatically fix invalid RBE3, such as:

◦ RBE3 attached to solids with rotational dofs defined on component fields for independent grids.

◦ RBE3 which is not attached to any structure

With this param activated, the fixed RBE3 will be printed in the .out file for the user to check.

• Surface stress extraction for Linear Analysis

Surface Stress extraction (INT0 on ISOP field in PSOLID) with GAUSS stress output is nowsupported for Linear Analysis.

• General table data (TABLEG)

Generic table data with tabular data format has been introduced and this table data can be used inthe following situations:

◦ TABLEG can replace TABLED1, referenced by RLOAD# and TLOAD# entries.

◦ TABLEG can replace TABLEM1, referenced by MATT# entries.

◦ TABLEG can replace TABLES1, referenced by MATS1 and PCONT entries.

◦ TABLEG can replace TABLES1, referenced by TABLEST entries which are in turn referenced byMATS1 entries.

• SPC/SPCD definition through GRID SET

SPC/SPCD bulk data can now be defined by set of GRID instead of individual GRID IDs.



Figure 1:

Figure 2:

• ERROR/WARNING for unrecognized case control and bulk entries

SYSSETTING(UNKNDATA=ERROR/WARN) has been added. WARN is the default.

• ERROR/WARNING for control cards with no corresponding IDs in bulk data

SYSSETTING(UNREFSID=ERROR/WARN) has been added. ERROR is the default.

Unreferenced control cards implies cards which do not have expected reference in the bulk section.For example, MPC=2 is defined in case control section but there is no MPC with ID=2 in bulksection.

Currently, MPC, SPC, NSM and NSGE are supported.

• New Subtype “DMIG” for GRID/ELEM bulk SET

SET,ID,GRID/ELEM,DMIG

This could be used for output requests including ERP output in superelement residual run.

Output• Strain at GAUSS point for solids is available

• GAUSS and Corner option for stress/strain in composites are supported

• Corner option for composite stress (CSTRESS) is now supported

• Corner option for strain in Transient Analysis is available

• GAUSS and corner option for Neuber in Linear Analysis is now supported

• Neuber stress/strain for Frequency Response and Transient Analysis

• PSD/RMS composite stress/strain (CSTRESS/CSTRAIN)

• Strain energy (ESE) recovery in superelement recovery run

• Strain energy recovery in superelement residual run

This is for normal mode, transient and frequency response. Stress and strains should be requestedin superelement (DMIG) generation run. Strain energy recovery is supported for H3D files.

• Stress/strain output from random response is in elemental system instead of material system

Solvers and Performance• Automatic memory expansion for FASTFR



Prior to this release, the number of CPUs specified for FASTFR (-nt, -nproc) could be reduced ifnot enough memory is allocated to accommodate all the CPUs. The enhancement in this release isto automatically expand the memory in order to use all the CPUs specified by the user.

• LFREQ support for FASTFR run

• DDM for Transient Analysis

DDM is now supported for Transient Response Analysis.

• -ddmngrps script option is added, which is equivalent to PARAM,DDMNGRPS

This is supported to activate multi-level DDM runs. In previous release, only PARAM,DDMNGRPSwas available. Now -ddmngrps is available as a run option.

Resolved Issues• APPLOD option for RESVEC had an issue and did not generate any residual vector. This is now fixed.

• DDM (Domain Decomposition method) with Infinite Element did not work properly and this is nowfixed.

• ALPHA field on RBE2/RBE3 was not working properly for some situations due to internal numbering.This is fixed.

• Nonlinear analysis (with many subcases) failed due to insufficient memory after the analysisconverged. This is now fixed.

• MPCF for modal transient could be wrong if AMSES/AMLS was used. This is fixed.

• Modal frequency response results could be wrong if FASTFR is used with PBUSHT and largevariation of material damping. This is now fixed.

• Sine sweep with SURFSTS on FATPARM caused error 251. This is fixed.

• PFPATH job would crash if the model has only fluid MPC but no structural MPC. This is fixed.

• 1st order axi-symmetry elements has a numerical issue that triggers unnecessary AUTOSPC. This isfixed.

• FATAL PROGRAMMING ERROR 8014 could happen if the stress responses for design (topology orfree-size) and non-design regions are included in the same DRESP1. This is now fixed.

• ROMAX recovery matrices could have an issue for certain scenarios and this is now fixed.

• Mode tracking feature for optimization has an issue in that it only tracks first 5 modes. This is nowfixed.

• Complex eigenvalue with AMSES using Material damping GE caused the programming error. This isnow fixed.

• Programming error for transient with DDM has been fixed.

• Contact pressure/force results for Node-to-Surface (N2S) contact in small displacement nonlinearanalysis was incorrect. This is now fixed.



MotionSolve 2017.2.3 Release NotesWhat's new and changed in MotionSolve.

HighlightsMotionSolve is a state-of-the-art multibody solver available in HyperWorks. It has a complete set ofmodeling elements and powerful numerical methods to support a full set of analysis methods. Theaccuracy, speed and robustness of MotionSolve has been validated through extensive testing withcustomer models and test data. MotionSolve also offers unmatched compatibility with ADAMS/Solverinput.

In version 2017.2.3, MotionSolve brings enhancements and bug-fixes to the existing capabilities.

EnhancementsMemory usage improvements for 3D contact

The total amount of system memory used when simulating a model containing multiple 3D rigidbody contacts has been optimized with this release. By re-using contact mesh data and pre-processing data within the solver, the memory footprint has been reduced substantially for modelsthat contain a large number of contacts.

In practice, the reduction in memory usage will depend on both the number of contacts in themodel as well as the density and size of the meshes being used.

Retrieve joint friction results in any frameWith this release, you can use the FRICTION function to specify a third argument - rm. Thisargument lets you specify a custom frame of reference for retrieving joint friction results.

2D curve-curve contact supports matrix definitionsWith the current release, you can use data defined within the Reference_Matrix element to definethe curves used for 2D curve-curve contact.

Note: The matrix used must have exactly three columns, for the X, Y and Z data ofthe curve.

Control number of threads used by mspostWith this release, you can specify the maximum number of threads that mspost uses whenrunning in standalone mode. This is useful when you want to limit the CPU consumption bymspost for large result files.

Note: When running the model from MotionView or the Solver Run Manager, mspostwill “inherit” the number of threads specified for the overall job. That is, if youspecified “-nt 4” i.e. maximum number of threads allowed are 4, then mspost willalso limit itself to using a maximum of 4 threads.

Additional outputs available through CONTACT functionWith this release, you can now retrieve more contact related results using the 4-parameterCONTACT function. Additional results that are now available:

• Maximum penetration velocity



• Average penetration velocity

• Maximum slip velocity

• Average slip velocity

• Friction power

For more details on usage, please refer to the documentation for CONTACT.

Resolved IssuesResults file for MotionSolve - AcuSolve co-simulation

Previously, during a co-simulation with AcuSolve, MotionSolve may write result data into theoutput file (MRF) at a different frequency than specified. This has been corrected with this releasesuch that the frequency of output results matches the print_interval specified.

License error when using VSTIFF integrator during MotionSolve - AcuSolve co-simulationWith the previous release, if you selected any integrator except DSTIFF for MotionSolve during aMotionSolve - AcuSolve co-simulation, you were presented with a license error message. This wasdetermined to be a bug and is now fixed.

Note: You may still, only use DTSIFF for co-simulation with AcuSolve. Using any otherintegrator will halt the simulation with an appropriate error message.

Mismatch in graphics color between MotionView and HyperViewWith the previous release, some graphics in the model may appear in a different color inMotionView than in HyperView. This was determined to be a bug in the H3D writer and has beenfixed within MotionSolve.

Incorrect output result timesWhen dae_interpolation is set to FALSE and h_max is not the same as print_interval, MotionSolvemay write output results at incorrect times. This has been corrected with the current release.

PINVAL, POUVAL not working with SYSFNCPINVAL and POUVAL support within SYSFNC has been fixed with this release.

CONTACT function ignores RMThe 3 parameter CONTACT function ignored the RM argument while calculating the averagecontact point. This has been fixed with the current release.

User Written Tire Models now return non-zero wheel omegaFor user written tire models, MotionSolve outputs the wheel rotational velocity about the spinaxis (OMEGAR) that it inputs to the tire model rather than the value the tire model returns inVARINF(50). This mimics the behavior of the ADAMS implementation of the TYDEX Standard TireInterface, where OMEGAR is output even when the user written tire model returns VARINF(50) =0.0.

CDTire and OpenCRG now handle road data files larger than 2GBPreviously OpenCrg road files larger than 2 GB could not be loaded, causing simulations to fail.This was a known problem in OpenCrg version 1.0.6. To correct the problem, CDTire is updated touse OpenCrg version 1.1.1.



Multi-threaded execution of FTIRE and CDTire is now defaultWhen you use FTIRE or CDTire with MotionSolve, by default FTIRE and CDTire are multi-threadedto improve execution speed.

Altair Driver does not fail when started at times greater than zeroPreviously if simulated a vehicle model for some time and then started Altair Driver using theuser control command, the static simulations the Driver performs to identify the steering ratiowould fail because time was greater than zero. Altair Driver will now start successfully when timeis greater than zero.

Altair Driver does not maintain speed on hillsPreviously if you asked Altair Driver maintain a constant speed for a vehicle driving on a road withelevation gain or loss, the vehicle would speed up going downhill and slow down going up. Nowif the path data you give the Altair Driver contains height (z), Altair Driver’s feedforward speedcontroller will detect the gradient and apply more throttle when the vehicle is traveling uphill andless throttle when traveling downhill. Alternatively you can tell Altair Driver to employ a secondaryPI controller to compensate road gradients.







• MotionSolve 2017.2.2 Release Notes (p. 27)


RADIOSS 2017.2.2 Release NotesHighlightsThis version RADIOSS fixes critical issues detected in 2017.2.1 release and includes an update of the bi-quadratic failure criteria.

Failure ModelsImprovements to /FAIL/BIQUAD

Percentage of thickness (in case of shells) to failure (based on the integration points over thethickness)Predefined values for 7 different materials:

• Mild Steel

• HSS Steel:DP600

• UHSS Steel: (Boron/Usibor) 22MnB5

• Aluminum: AA5182

• Aluminum: AA6082-T6

• Plastic: PA6GF30

• Plastic: PP T40

Possibility to apply self-defined valuesPossibility for checking localized necking (instability strain needed in addition)

Contact InterfaceImprovements to /INTER/TYPE19

New flag Iedge to select for the edge to edge treatment between:

• all the all the surface edges

• only the external border edged from shell elements.

Resolved Issues/MAT/LAW70 + /TETRA10 with formulation Ismstr=11

Possible wrong internal energy value

/PERTURB + /FAIL/BIQUADNumerical differences with /PARITH/ON setting

/AMSWrong node group identifier reported in the engine listing file.

/ANIM/SHELL/TENS/STRAIN/ALL/ALLLayer IPT information is not available.

/ANIM/SHELL/EPSPThe outputted plastic strain for each layer is now correct.

/PROP/TYPE51 and /TH/SHELLPotential computation stop when the number of integration point per layer is greater than 1.



/INTER/TYPE11Possible computation fail on cluster when Idel>0 and Iform=2

/MAT/LAW42 (and LAW69) + /PROP/SHELLPossible divergence or Engine hang

/MAT/LAW24Possible NAN in the Engine run.

/FAIL/TAB1 (and /FAIL/TAB)Default elements deletion criteria has been restored: element is deleted independently from orderof failure of IP (same as in 14.0.230). Sequential IP failure criteria is available also, but no longerdefault.

/SURF/DSURFStarter might take long time to process surface.

/MAT/LAW76 + Iconv=1Possible divergence (both for shells and solids)

Engine output file (*.1.out)+ SPMD

• Possible truncation of output message for composites failure (time information for failedintegration points)

• Elapsed time measurement might be wrong; Elapsed time only is affected, CPU time iscorrect

Starter listing file (*0.out) + /MAT/LAW36 (ERROR ID 480)Starter output file says EPST1 and EPST2 while in the documentation these variables are namedEPS_T and EPS_M




HighlightsAltair OptiStruct is an industry proven, modern structural analysis solver for linear and non-linearmechanical problems under static, dynamic, and thermal loads. It is the market-leading solution forstructural design and optimization. Based on finite-element and multi-body dynamics technology, andthrough advanced analysis and optimization algorithms, OptiStruct helps designers and engineersrapidly develop innovative, lightweight and structurally efficient designs. OptiStruct is used bythousands of companies worldwide to analyze and optimize structures and mechanical systems forstrength, durability, noise and vibrations, heat transfer, as well as impact.

The major items for theOptiStruct release are:

• Preloading with Large Displacement Nonlinear Analysis

• Self-Contact with Surface-to-Surface

• Modal FRF for Infinite Element

• Nonlinear Thermal Transient (Beta)

• Maximum Bead Width control for topography

• Corner and grid point stress for optimization responses (size/shape optimization)

• DRESP3 with OML language in Compose

Stiffness, Strength and Stability• Large Displacement Nonlinear Analysis can be applied as preload to Linear static, Direct/Modal

Frequency Response, Modal Transient, and Normal modes analyses. The STATSUB(PRELOAD)subcase entry can now point to a Large Displacement Nonlinear Analysis subcase.

• Generation of nontied.fem file for grids outside of search distance. This is supported for TIEand CONTACT with FREEZE option. This is turned on by default and can be turned off by usingCONTPRM,NONTIED,NO. This will allow easy identification of which nodes are not tied because thegrids are outside of search distance.

• Search distance in Contact analysis now takes the correct shells thickness into consideration. Forexample, for shells without offset half the thickness is considered for search distance calculation.

• Enhanced penalty for Node-to-Surface (N2S) contact, which helps avoid the singularity for somemodels.

• Option added in TLOAD1/TLOAD2 to choose either subcase time or total time for nonlinear analysis.The TSTIME field is now available to switch between Total time and Subcase time via the TOTAL orSUB options. The default is TOTAL.

• Self-Contact for Surface-to-Surface type of discretization is now supported.

• Damage evaluation and output based on the user defined table data (equivalent plastic strainallowable vs temperature). Damage is the ratio of equivalent plastic strain results and its allowablewhich is a function of temperature as table data. The results are evaluated at the center as well asthe integration points of each elements. Supported element types are solids and shells.

• STOP/LOCK option for JOINTG Cartesian type



Noise and Vibrations• Modal Frequency Response for Infinite Element is now supported in addition to direct method which

was already supported in version 2017.2. Modal Frequency Response solution for Infinite Elementsis also supported with Domain decomposition method, for additional runtime improvements.

• Search algorithm for Infinite element has been improved for both accuracy and runtimeimprovements.

• Six additional global RESVECs for Superelement generation with Component Mode Synthesis(CMSMETH) can be added with SYSSETTING(RESVEC6=ON).

• The ALLSET field is now available on the ACMODL entry. If “ALLSET=NO” then SSET structure issearched and coupled if found. If ‘ALLSET=YES’ then the structural grids given by SSET and fluidgrids by FSET will be coupled through repeated bounding box searches until all grids are coupled.

• Element set option added in NSM1/NSML1. The TYPE field can now be set to ELSET to identify anelement set.

• PEAKOUT is now supported for ERP output.

Thermal Analysis• Nonlinear Thermal Transient is supported. This will allow the inclusion of temperature dependent

conductivity in the model.

Composites• Repeat Laminate is added and can be activated by specifying the number of repeats in PCOMP/

PCOMPG/PCOMPP. The NRPT field is now available on PCOMP/PCOMPG/PCOMPP entries can be usedto identify the number of repeat laminates.

• The NDIV option (which is to specify the layer for results recovery) for CSTRESS/CSTRAIN/CFAILURE now supports second order elements.

Fatigue• Random Response Fatigue Analysis is now supported for Strain-Life (EN) Fatigue.

• Sine-Seep Fatigue is supported for uniaxial fatigue (von Mises as combined stress method). Stresslife (SN) and strain life(EN) are both supported. The LCID field on FATLOAD can now reference aFrequency Response analysis subcase. The SWEEP continuation line on the FATLOAD entry andcorresponding sweep parameters via SR and SRUNIT fields are required. The SWEEP continuationline on the FATPARM entry can be used to define the frequencies at which Sine sweep fatiguecalculations are performed. The T# and FID# fields on FATSEQ are used to identify the number andtype of sweeps.

• Multiple SN data can be defined for different mean stress through the FATMCRV entry which can bereferenced on the SNCM continuation line of the MATFAT entry. The input on FATMCRV would be themean stress and TABLEXN IDs. TABLEXN defines stress vs life. Alternatively, TABLEXN can directlybe referenced in MATFAT and in that case, there is single SN curve in analysis.

• Performance Enhancement for Random Response Based Fatigue with DOPTPRM,APPROX (LOW,MED, or HIGH options) is now available. Random Response Based Fatigue optimization shouldexhibit significant performance improvement with this enhancement.

• EL2PROP, which is required for Fatigue analysis after the MBD analysis with MotionSolve nowrequires the bulk data IDs. ELSETID, PTYPE, PROPID will be defined in continuation line.



General Updates• PARAM,GLOBEXPT,N is added for global-local analysis.

◦ 1, (default), expand patch - use nearest N elements for interpolation results, where N isrespectively 6 or 8 for shell or solid mesh near the transfer grid location in the global model.

◦ 0, do not expand patch. Use only the single, nearest element for each GRID in the transferzone.

• More than 8 digits of IDs for bulk data is acceptable such as IDs for FORCE, RLOAD and so on.

• The CAABSF element is now available as model data in the H3D file.

• Elements removed by using MODCHG are now removed in H3D file for subcases withSTATSUB(PRELOAD,BUCKLING, or BRAKE) pointing to the nonlinear subcase with MODCHG.

• Component colour for PLOTEL is accurately retained in H3D file.

• SPCD can now be reduced out in DMIG generation run. The appropriate reduced loading will becalculated for this process. SPCD IDs should be specified on the LOADSET continuation line onCMSMETH bulk entry.

• Duplicated PLOTELs or Duplidated Scalar elements, that is, CMASS2 and CELAS2 with same IDs arenow allowed with SYSSETTING(ELEMENTID=ALLOWFIX)

Optimization• Discrete thickness in composite Free-Size is allowed. The PMDIS field (discrete thickness step) is

added to the PLYMAN manufacturing continuation line on the DSIZE entry.

• Another method (Penalty) for overhang angle constraint. This method could be used if the smallviolation of overhang is allowed in order to maintain the certain performance of the structure. If theoverhang angle constraint needs to be strictly satisfied, the previously available method (Constraintmethod) should be used.

• Composite manufacturing constraints are now allowed in MMO (Multiple Model Optimization).

• Automatic ZONE generation in composite Free-Size is available so that ZONE will be internallygenerated based on the size of zone specified on the GROUP continuation line in DSIZE entry.

• Maximum Bead Width constraints is added for topography optimization. The MAXW continuationline is now available on the DTPG bulk entry, with maximum bead width (MAXWTH), minimumheight ratio (MINHGT), and control for zero height beads (ZEROB) fields.

• Corner Stresses or Corner strains as optimization responses for size/shape optimization is nowsupported. The ATTB field can now be set to CORNER for Stress Response (RTYPE=STRESS) orStrain Response (RTYPE=STRAIN) on the DRESP1 entry. It is only supported for Solid elements.

• Grid Point Stress as optimization response for size/shape optimization is now supported. The RTYPEfield can be set to GPSTR and corresponding stress item codes are supported. It is only supportedfor solid elements.

• OUTPUT,BYITER now creates _des.h3d file (density for all/specified iterations in single H3D file)instead of writing density in H3D file for each iteration.

• DRESP3 with OML language with Compose is supported.

• Cross section response properties on user defined SECTION is available with RTYPE=SECTION onthe DRESP1 entry. The supported response types and the corresponding item codes are

◦ AREA – area, CY – centroid Y location, CZ – centroid Z location (the location of centroid inbasic system can be defined as CXB, CYB, CZB)



◦ J – polar moment of inertia, ROGY – radius of gyration about Y-axis, ROGZ – radius of gyrationabout Z-axis, IYY – area moment of inertia about Y-axis, IZZ – area moment of inertia aboutZ-axis

Solvers and Performance• Domain Decomposition Method can now be combined with Load Decomposition Method with

PARAM,DDMNGRPS,<ngrps>. Here ngrps identifies the number of groups into which the specifiedMPI processes (-np) are divided. This parameter is supported for Task-based DDM runs, and GlobalSearch Option (DGLOBAL) with DDM. An additional option ngrps=-1 is supported for Task-basedDDM runs to allow OptiStruct to automatically identify the number of groups.

Figure 3:

RIGID=AUTO is the default for certain situations. It allows to automatically choose either lagrangemultiplier method or constraint reduction, whichever more efficient, for a given problem. Refer toreference guide, RIGID case control card, for additional information.

• Faster calculation of SPCD residual vectors with AMSES (PARAM,AMSE4EFM) is now available.

• Trim Body example : 25 M DOF, 10988 modes, 56 SPCD DOF, 16 cores run (Xeon E5-2697 V4,512GB RAM, SSD disks)



Figure 4:

• Faster calculation of densed matrix system with EIGRD entry is now supported.

• Domain Decomposition Method (DDM) now supports Modal Transient Analysis.

Resolved Issues• Nonlinear analysis model may encounter the programming error if SPCF output is requested and

the job does not converge (and still requesting non-converged results with NLADAPT).

• Random response for acoustic response using direct FRF could produce inaccurate pressure results.This is now fixed.

• Inaccurate sensitivity for stress response due to temperature loading has been improved.

• Error 216 could happen if MODCHG model runs with DDM mode. This has been fixed.

• The compliance calculation could be wrong for buckling analysis with nonlinear static subcase. Thisis now fixed.

• Depending on the memory allocated, MAXRATIO does not report the proper error. This has beenfixed.

• OP4 reader with ASSIGN may not read the reduced matrices correctly. This has been fixed.

• Wrong damage results when only one loadcase defined in FATEVNT has been fixed.

• Programming error in file “sparsekit” from buckling analysis has been fixed.

• Wrong convention of orientation of ply for PCOMPLS has been fixed.

• Programming error in file “sparsekit” from buckling analysis has been fixed.

• Wrong results with acoustic random response with direct FRF has been fixed.

• Sensitivity for FOS is now correctly available in asens file.



• Non-Convergence for nonlinear large displacement with CBEAM offset has been fixed.

• RANDOM response fatigue with FREQ4 is now correctly supported.

• SN Fatigue with single subcase used in FATLOAD and the expected life is very short then the resultswas wrong in old version. This is now fixed.



MotionSolve 2017.2.2 Release NotesWhat's new and changed in MotionSolve MotionSolve.

HighlightsMotionSolve is a state-of-the-art multibody solver available in HyperWorks. It has a complete set ofmodeling elements and powerful numerical methods to support a full set of analysis methods. Theaccuracy, speed and robustness of MotionSolve have been validated through extensive testing withcustomer models and test data. MotionSolve also offers unmatched compatibility with ADAMS/Solverinput.

In version 2017.2.2, MotionSolve brings enhancements and bug-fixes to the existing capabilities.

EnhancementsPerformance Improvement for 3D Contact Calculations

Contact detection performance is improved for simulations where large contact areas/patchesare encountered. This is typically the case when the rigid body penetrations are large and/orthe mesh used for the contacting geometries is very fine resulting in a large number of trianglescoming into contact.

Support for CONTACTPOST Added in Python LayerThe CONTACTPOST sub routine is available in the Python layer for querying the contact resultsduring runtime.

Improved Parasolid File Handling in Solver Post-processingIf your model contains Parasolid file graphics, you will now see much better performance whenthe solver writes the animation results to the output H3D file. This is achieved by caching thepart/body information in the Parasolid graphics file to avoid repeated reading of the graphics file.

Resolved IssuesPoint Mass as J body of Bushing Does not Work as Intended

Using version 2017.2, you were unable to successfully solve a model that specified a point massbody as the J body (marker) of a bushing. This has been fixed such that you can now specify apoint mass body as one of the two bodies connected to a bushing.

MotionSolve – AcuSolve Co-simulation Produces Incorrect ResultsWith the previous release, several simulations that made use of co-simulation betweenMotionSolve and AcuSolve produced wrong results or failed. This was identified as a regressionand has been fixed with the current release.




HighlightsAltair OptiStruct is an industry proven, modern structural analysis solver for linear and non-linearmechanical problems under static, dynamic, and thermal loads. It is the market-leading solution forstructural design and optimization. Based on finite-element and multi-body dynamics technology, andthrough advanced analysis and optimization algorithms, OptiStruct helps designers and engineersrapidly develop innovative, lightweight and structurally efficient designs. OptiStruct is used bythousands of companies worldwide to analyze and optimize structures and mechanical systems forstrength, durability, noise and vibrations, heat transfer, as well as impact.

The major items for the 2017.2.1 release are:

• Energy output (Contact stabilization and internal energy) is available for Large DisplacementNonlinear Analysis.

• Large Displacement Analysis for composites (PCOMP(G), PCOMPP) – Beta feature

• Infinite Element for exterior noise calculation - Beta feature

• Overhang angle constraint for Topology Optimization

• Reliability based Topology Optimization (RBTO)

• Composite Stress/Strain/Failure responses for topology/Free-size

• HDF5 Format support for Results

Stiffness, Strength and StabilityPCOMP(G), PCOMPP are now supported for Large Displacement Analysis

PCOMP(G) and PCOMPP are now supported for large displacement nonlinear analysis.PARAM,LGDISP,1 or NLPARM(LGDISP) can be used to activate large displacement analysis forcomposite models.

PSD/RMS Principal stress outputPSD/RMS Principal Stresses are now available from Random Response Analysis. This is currentlyonly supported for H3D results.

SPC Force output for intermediate steps in Large Displacement Nonlinear analysis is available in OPTIformat.

SPC Force output for intermediate steps in Large Displacement Nonlinear Analysis is available inOPTI format via the NLOUT entry.

POST TOFILE support for H3D formatH3D output is now supported using the POST TOFILE command.

Stress and Strain output are available for JOINTG in the H3D fileStress and Strain output are available for JOINTG in the H3D file.



Integration points on the surface of solids for nonlinear material (MATS1) and/or large displacementanalysis.

Integration points for solids will be placed on the surface for better evaluation of results. This canbe done by setting ISOP=INT0 on PSOLID in conjunction to the STRESS(GAUSS)=YES command.It is currently supported for first and second order solid elements for small displacement plasticityand large displacement nonlinear analysis.

Energy output from nonlinear analysisContact Stabilization energy and the Internal energy are output in for large displacementnonlinear analysis. The output is only available when NLOUT is defined. The results are outputto an ASCII file entitled filename_e.nlm and a HyperView/HyperGraph session file entitledfilename_nlm.mvw.

Noise and VibrationsInfinite Element for exterior noise calculation

Infinite Element is available for exterior noise calculation. The CACINF3 and CACINF4 bulk dataentries can be used to define infinite elements. The PACINF bulk data entry can be used to definethe properties of the infinite element. The pressure on far field can be output with DISPLACEMENToutput request. Currently only direct Frequency response is supported.

Modal Mass Fraction output from normal modes analysisModal Mass Fraction output from normal modes analysis is now output to the .out file

CompositesMultiple Failure Criteria output from single analysis run

Multiple Failure Criteria is specified on the MATF entry and the output is available in OPTI and H3Dformat.

General UpdatesMass matrix output

Mass matrix is calculated and available in the .mgg file. This is activated by thePARAM,PRTMGG,YES command.

HDF5 output format is now supportedThe HDF5 output format is currently supported for the following elements:HDF5 output request is added for DISPLACEMENT, STRESS (including CORNER), STRAIN(including CORNER), FORCE, CSTRESS, CSTRAIN, OLOAD, SPCFORCE, GPFORCE entries. Inaddition, HDF5 output option is available on the OUTPUT and FORMAT entries.CBEAM, CBAR, CQUAD4, CQUAD8, CTRIA3, CTRIA6, CHEXA, CPENTA, CTETRA, CPYRA (both firstand second order are supported for the listed solid elements).The HDF5 output format is currently supported for the following Analysis types:Linear Static, Normal Modes, Linear Buckling (only Displacement results are supported for LinearBuckling).



OptimizationOverhang angle constraints for topology optimization

Overhang angle constraints is now available in topology optimization. New continuation line,OVERHANG, was added in DTPL for this purpose. The user input would be the angle and theprinting direction.

Composite Stress, Composite Strain, and Composite Failure responses for Free-size OptimizationComposite Stress, Composite Strain, and Composite Failure responses are now available for Free-size Optimization.

Metallic Failure output and optimization responseFactor of Safety and Margin of Safety are available as output as well as optimization response.The stress allowable is defined on MAT1. von Mises, Principal and Tresca are supported as failurecriteria.

Radial Draw Direction for TopologyTopology Draw direction constraints are now available to be defined in R-direction of cylindricalsystem.

Parallelization for Global Search Option (DGLOBAL)DGLBOAL can be parallelized under DDM mode using the –np and -ddm run options. Currentlywe support a single level of parallelization with multiple starting points assigned to multiple MPIprocesses. The individual starting point runs are not MPI parallelized

Reliability Based Topology optimizationReliability Based Design Optimiztion (RBDO) is now supported for topology optimization.Additionally the loading can now be defined as a random parameter using the DVLREL1 entry.

Base thickness for shell topology is now available for visualization in H3D file

Base thickness for shell topology is now available for visualization in H3D file

Discrete variable is now supported with DUAL optimizer for sizing, Freesize/topology optimization.Discrete design variables are now supported with DUAL optimizer for Sizing, Freesize/Topologyoptimization. Combined optimization of Topology and Sizing optimization with DDVAL is nowsupported.

Principal Strain Angle response for Composite optimizationPrincipal Strain Angle response is available for Composite optimization using the PSA, PSA-T, PSA-B, and PSA-O Composite Strain item codes.

Segalman PSD/RMS Von mises Stress and Strain are available for optimizationSegalman PSD/RMS Von mises Stress and Strain are available for optimization using the SVM itemcode for Solid elements and SVMB, SVM1, and SVM2 item codes for Shell elements.

Option added to switch from Amplitude based MATFAT input to Range based inputThe new A/R fields on the MATFAT entry can now be set to A (Amplitude) or R (Range) to indicatewhether the material data is based on Amplitude or Range.

Fatigue analysis after MBD stress recoveryStress recovery is possible in OptiStruct with ASSIGN,H3DMBD after the multibody analysis withflexbody is done with MotionSolve. Fatigue analysis is supported in this process such that thefatigue results will be available after the stress recovery. An additional Fatigue subcase can nowbe added to run Fatigue analysis with the stress results from the flexbody.



Static Loading can now be applied sequentially in Fatigue AnalysisThe SQNTL flag is now available on the FATEVNT entry to switch the applied Static Fatigue loadsto sequential loading instead of super-positional loading.

Solvers and PerformanceDDM support

DDM support for Normal Modes analysis with MFLUIDDDM support for Direct Frequency Response with MFLUID

Automatic constraint handling is now available for Normal Modes analysis (with Lanczos) and Staticanalysis.

The RIGID=AUTO command will let OptiStruct automatically determine and switch to the moreefficient method (Constraint reduction or Lagrange multiplier) for a given problem.

Resolved Issues• Negative Stress Range results were printed with the RNFLOW output request. This has been fixed.

• There was an issue with SET-based results with RNFLOW output request. This has been fixed.

• An Internal Programming error when NLOUT and DMIG are used has been fixed.

• An Inertia relief model may run for a long time when MAXRATIO is defined. This has been fixed.

• Internal bar/beam constraints may be violated and an error 789 could occur if the DUAL optimizeris enforced with DOPTPRM,OPTMETH,DUAL (the issue also depends on the bound of design variablefor bar/beam cross section). DOPTPRM,OPTMETH,DUAL2 is more efficient for such problems.

• Force balance output was incorrectly calculated for Large displacement analysis. This has beenfixed.

• Nonlinear transient with TLOAD2 was working incorrectly and this has been fixed.

• Large disk requirement with MATT1 has been enhanced.

• Preloaded normal mode analysis due to RFORCE was not correct if RFORCE was referenced byLOAD bulk card. This has been fixed.

• Incorrect GAUSS results were output when the membrane CTRIA3 is present in input file. This hasbeen fixed.

• SPCF was not accurate in continuation subcase when non-zero SPCD is changed into zero SPC. Thishas been fixed.

• For large displacement nonlinear analysis using DDM, the plastic strain output in out file wasprinted as zero. This has been fixed.


HyperWorks Solvers 2017.2Release Notes 5

HyperWorks Solvers 2017.2 Release Notes


• RADIOSS 2017.2 Release Notes (p. 34)

HyperWorks Solvers Release NotesHyperWorks Solvers 2017.2 Release Notes p.34

RADIOSS 2017.2 Release NotesWhat's new and changed in RADIOSS 2017.2.

HighlightsIn this release, the TYPE24 contact was improved by adding an easy to use edge to edge contact optionwith full HMPP parallelization. The behavior of TYPE24 contact forces caused by initial penetration waschanged so that the forces is slowly increased making models with large initial penetrations more stableand can be used to model press fits situations.

Three new material laws were added. Material LAW88- a new simplified hyperelastic material with strainrate effects, Material LAW93 - a new orthotropic elastic law with Hill plasticity, and Material LAW94 -Yeoh hyperelastic model.

A new advanced failure criterion /FAIL/BIQUAD was added which provides a powerful and extremelysimple tool to model failure and includes a database of pre-defined materials. There is also an option toperform stochastic studies by applying perturbations to the rupture strain value.

Improvements were made to the venting calculations associated with finite volume airbags. Last a newsensor based on work was implemented.

ContactsImprovements to /INTER/TYPE24 contact

TYPE24 contact now includes an algorithm for edge to edge contact that can be activated usingthe new input flag Iedge=1. The implementation also supposed hybrid parallelization mode.TYPE24 contact now supports the removal of segments from contact due to element deletionusing the Idel option.The Inacti=-1 option was improved so that the initial forces due to initial penetrations areincreased from zero to the full contact force in the first 10000 cycles of the simulation. This allowspress fits situations to be simulated.

/INTER/SUB now works with TYPE19 contactSub Interfaces can now be used with /INTER/TYPE19 contact.

ConnectorsImproved tied contact formulation

When the tied contact, /INTER/TYPE2, Spotflag=27 option is used, the penalty formulation nowincludes moment transfer like the standard kinematic formulation.

PropertiesAutomatic switch of solid element formulation Isolid=12 into Isolid=17

Any time the obsolete solid element formulation Isolid=12 is used with an incompatible material,the element formation is switched to Isolid=17 and a warning message is written in the starteroutput.

New solid element small strain switching methodFor solid elements, a new small strain option, Ismstr=12, is available to switch from Lagrangetype total strain to small strain, Ismstr=11, based on a specified time step in /DT/BRICK/CST.



Non-symmetric friction model added to spring pulleyA new non-symmetric friction model was added to the spring pulley, /PROP/SPR_PUL.

Reduction in simulation timeThe cpu cost of using /PROP/SOLID Lagrange type total strain, Ismstr=10, with material LAW1was reduced.

AirbagsImproved venting calculation with /MONVOL/FVMBAG1

The method for calculating the airbag venting through vents and porous components which sharecommons nodes was improved.

Improved venting between internal airbag chambers/LEAK/MAT now supports material LAW19 for /MONVOL/FVMBAG1 airbags which allows bettermodeling of fabric porosity through internal airbag surfaces.

/MONVOL normal checkingRADIOSS now stops with an error if a negative initial airbag volume is detected due to incorrectnormal.

Materials and Failure ModelsNew strain based failure model, /FAIL/BIQUAD

This simplified non-linear strain based failure criteria with linear damage accumulation alsoincludes the ability to add perturbation using /PERTURB/FAIL/BIQUAD

Material LAW88, a new simplified hyperelastic material with strain rate effectsThis tabulated Ogden hyperelastic material law can model strain rate effects. The material lawtakes as input stress strain curves at different strain rates in loading along with an unloadingcurve or hysteresis values.

Material LAW94 (Yeoh) hyperelastic modelThe YEOH material was added to model incompressible hyperelastic behavior.

New cap hardening model for LAW24Additional improvements were made to the default cap hardening model and can be activatedusing Icap=2 in LAW24.

Viscous effects with LAW62 and shells elementsSupport was added to for viscous effects in LAW62 with shell elements.

CompositesFailure of /PROP/TYPE51 now includes integration point output

When using property TYPE51, failure messages written to the starter output file now include theintegration point which failed.

Material LAW93, a new orthotropic elastic law with Hill plasticityThis new material law can be used to model short fiber reinforced which are orthotropic in theelastic region. Hill plasticity with Lankford parameter input is used for the plastic region. This lawcan be used with manufacturing simulations results where the results are mapped to a structuralpart.



Forming, Additive ManufacturingForming limit diagram failure model enhancements

/FAIL/FLD was enhanced as follows: new options for the shell failure flag Ifail_sh, the ability toinput the FLD curve in true or engineering strain values, and input for the average anisotropyfactor.

Forming limit diagram failure zone contour output based on shell element integration points, /ANIM/SHELL/FLDZ

A new animation output request was added which outputs the FLD failure zone contour.

Improvements for the stamping contact interface, /INTER/TYPE21A new option, ITlim was added to limit the tangential force using maximum contact pressureinput. An option, Invn was added to test if master normals are oriented towards the blank.

New Imposed thermal flux input, /IMPFLUXAn imposed thermal flux can now be input for specific surfaces.

Simplified input for activating elementsA user can now define the element activation time directly in the /ACTIV keyword using Iform andTstart.

MiscellaneousSensor based on work, /SENSOR/WORK

This new sensor calculates work based on the the displacement of nodes and force output from arigid wall, interface, rigid body or section.

Solution SpeedGlobal time step compatibility with tied contact formulations INTER/TYPE2, Spotflag=27

The global time step method can now be used with tied contact option Spotflag=27 which usesa kinematic formulation by default and automatically switches to penalty formulation whenincompatible kinematic conditions exist.

Thermal time factor speedup, /THERMALFor thermal analysis, a time factor speedup can be entered which scales all thermal properties.

Option to apply advanced mass scaling to an entire rigid bodyThe option, Iexpams was added to /RBODY which will apply AMS to all the slave nodes of the rigidbody even if some of them are not included in the AMS definition. This prevents low time steps forrigid bodies in simulation with AMS.

ALE, CFDNew ALE outputs

/ANIM/ELEM/VFRAC, a new animation file for nodal volumetric fraction. /ANIM/ELEM/VOLU,volume of each phase for material LAW51.

Upwind Method for Momentum Advection, /UPWM/SUPGNow works with 2D Eulerian simulations and material LAW51



Solid to SPH option to control particle activation/SPHGLO now includes a new option, Isol2sph which controls the activation of particles based onpart or subset.

Resolved IssuesContacts

Issue where Stmin was not used in /INTER/TYPE19 contactImproved TYPE24 initial penetration warning messagesTYPE24 contact not working with Tstart=0.5, Inacti=-1 on SPMD

ConnectorsTYPE2 tied contact issue with Ignore=1000 and dsearchComputation failure with TYPE2 tied contact using the thermal parameter and SPMDImposed displacement, /IMPDISP, now uses position at activation as reference when activatedwith a sensor

AirbagsWrong internal energy with TETRA4 elements, FVMBAG, Ismstr=10, Isolid=24 and airbagreference geometryFVMBAG1 give different results with different Iequi and TTF valuesFixed mass scaling issue when time step is controlled by FVM airbag

MaterialsLAW71: tensile/compression test, hexa model: double check force displacement curveSolid property in USER subroutines is not workingLAW76: instabilities with some elements formulationsLAW24: plasticity is incorrectLAW24: stress results are sensitive to unitsLAW24: wrong behavior with pointed impactorLAW24: TH OutputsLAW70: issue in bending

CompositesImproved output for /ANIM/SHELL/DAMACorrected different results from, /PROP/TYPE51 and LAW25, LAW27, LAW36/ANIM/SHELL/FAIL does not work with /PROP/TYPE51/PROP/TYPE17, Plyxfem, inconsistent results with solid model

FormingEngine stops with the Segmentation error with /RBE3, /AMS and /PARITH/OFFImplicit springback simulation fails if the work unit system is different than input

Additive ManufacturingIssue with activation and deactivation of imposed radiationCorrection of Stephan Boltzman constant during unit conversion/TH/BRIC: Correction of TH output of temperature for all 3D solid elements in case the element isOFFCorrections for thermo-mechanical analysis of solids

I/OIssue with animation file writing /ANIM/../PLY



ADMAS giving different value in 14.0 and 2017Total added mass value different between 14.0.220 and 14.0/MONVOL/COMMU1: wrong injected mass when several chambers are used/ANIM/SPRING/FORC results issue for the NSTRAND element/INISH3/FAIL wrong outputThe temp file used to create ABF files was not automatically removedABF file size are 2X as big as T01 filesSegmentation error when running big model with not enough RAM in a machineIncomplete Y file created when running SPMD on Windows platform

Solution SpeedAMS & deleted 8-node brick elements may cause random issueAMS and /DT/NODA/CST time step calculation with /PROP/SOLID Isolid=24 elementsAMS and rigid body cause slow run timesAMS, with deleted Tied interface TYPE2 gave strange resultsAMS with slave nodes in a tied interface TYPE2 and contact TYPE24 causes simulation to fail

Multi-DomainAMS simulation runs with 16 cpus SPMD but stops with 20 CPUs SPMDCalculated mass incorrect in T01 when using multidomain and multilayer shell properties TYPE11and TYPE16

MiscellaneousError caused by /INTER/TYPE6 + FCT_FROTV = 0AMS is used on solid elements only causes too large a time stepPARITH/ON issue when spring element activated using a /SENSORImproved starter error message with input error in /HEAT/MATParithOn issue with global time step was solved

MessagesWhen using AMS, added starter warning message if there are free nodes on /RBODY which do nothave AMS applied to themMissing output message for /DT/BRICK/CST/ in engine output

ImplicitAdded compatibility for tetra elements and orthotropic property /PROP/TYPE6 in implicit

ALE/CFDFixed /ALE model that worked in older versions but not in currentCorrect issues with LAW51 Iform=6 that caused simulations to stop


learn more at altairhyperworksblog.altair.co.kr/wp-content/uploads/2018/07/hwsolvers... ·...

Documents