femap 11.0(wn)

© Siemens AG 2013. All rights reserved.

Siemens PLM Software

Femap 11What’s New



Femap Release Schedule

For several years, Femap has been on an approximately yearly release schedule

v11: January 2013 v10.3.1: January 2012 v10.3: October 2011 v10.2: October 2010 v10.1.1: January 2010 v10.1: August 2009 V10: December 2008

Courtesy of Predictive Engineering



Femap 11Launch Plan

Femap version 11

Announcement: 9th January 2013 Available online on GTAC site Release to manufacturing:

early January 2013 Shipping to customers:

late January 2013

NX Nastran NX Nastran 8.5 is included in

Femap with NX Nastran bundle



Femap Direction

Femap continues to provide: A modeling environment that’s dedicated to FEA The in-depth, detailed functionality required to accurately model real-

world parts and assemblies Customer driven features and functionality

Courtesy of IHC Handling Systems

Courtesy of Duraldur

Courtesy of Femtec

Courtesy of GleisFrei



Femap 11Primary Focus and Messages

Improved productivity through process improvement Improved results data processing Streamlined XY plotting capability

Increased simulation scope through discipline extensions External superelement support NX Nastran integration enhancements

Faster preprocessing through performance improvements Improved graphics architecture



Femap 11Key Development Items

External results files

Graphics performance improvements

Create geometry from mesh

External superelement support

Streamlined XY plotting

NX Nastran integration

Customer driven enhancements



Femap 11 Results Data Considerations

Quantity of results data generated continues to increase Model sizes continue to increase Advanced analyses with incremental solutions can create huge

amounts of data Dynamic response time or frequency steps Nonlinear load or time steps

Time to access data increases Database sizes can become very large and unwieldy to manage

The solution: Option for external results files that can attach to the Femap modfem

database file



Femap v10.3 and Prior VersionsExternal Results Files

Imported results data (10.3 and prior versions)

Model Information,

Nodes, Elements, Materials, Properties, Loads, etc.

NX Nastran Results File

File / Import / Analysis Results…

.modfem .op2



Femap 11 External Results Files

Attached results data

Model Information,

Nodes, Elements, Materials, Properties, Loads, etc.

NX Nastran Results File

(.op2)File / Attach to Results…

.modfem .op2




Attach multiple databases

File / Attach to Results…

.modfem

.op2




Attach to external results files Femap modfem database size minimized

Results data import no longer required Postprocessing functionality does not change External and internal results can coexist Solver support rollout plan:

Nastran .op2 and FNO addressed initially

ABAQUS .odb, Nastran .xdb, ANSYS .rst to follow

Significantly increased efficiency for accessing transient results with attached results files vs. modfem imported results




International Space Station Laboratory Module188,935 Nodes184,592 ElementsOutput File: NX Nastran op2 26 Static Results Sets: 2.9GB

Results Mode

Model Size

Memory Import/Attach Time

Envelope Time

No results 68.8 MB 303 MB - -

Internal 3.3 GB 3.64 GB 103 s 200 s

Attached 70.7 MB 632 MB 17 s 164 s

>6x faster >20% faster




Benefits Greater efficiency with faster data access

Attach time >6x faster than import time Greater efficiency with reduced memory usage Smaller Femap modfem database size

More manageable data handling and storage



Femap 11NST External Results Example

Railway vehicle extrusion panel Advanced Nonlinear (SOL 601)

13,822 nodes 13,951 elements Model size without output: 6.968 MB NX Nastran op2 file: 5.85GB 2,556 nonlinear static results steps

　　　　

Results Mode Model Size PC Memory* Import/Attach Time Reopen Time

Internal 12.05 GB 7.75 GB 25min 220 s

Attach 8.692 MB 1.7GB 1min 1 s

Attach / Internal 0.486 ** 0.219 25x faster 220x faster

* Include other windows applications, ** Including op2 file



Femap 11NST External Results Example

“I was very impressed with the performance of the external results capability in Femap v11. Using this new feature, we were able to significantly reduce processing time while keeping the computer resource usage low. Reopening a large analysis result file was over 200 times faster. This is great news for CAE users who are concerned about the trend of increasing analysis model sizes.”

Cong Yuan, Engineering Department, NST



Femap 11Graphics Performance Considerations

Quantity of model data displayed continues to increase Model size trend still increasing Graphics performance improvement is a continuous process in Femap

Previous transition from Windows GDI to OpenGL Femap’s use of OpenGL continues to expand



Femap 11Graphics Performance Improvements

Vertex Buffer Object (VBO) An OpenGL feature that allows data to be uploaded to the graphics

card Offer substantial performance gains

Vertex data resides in graphics card memory rather than system memory

Vertex data can be rendered directly by graphics card

Vertex Buffer Objects (VBOs) are Buffer Objects that are used for vertex data. Since the storage for buffer objects is allocated by OpenGL, vertex buffer objects are a mechanism for storing vertex data in "fast" memory (i.e. video RAM or AGP RAM, and in the case of PCI Express, video RAM or RAM), thereby allowing for significant increases in vertex throughput between the application and the GPU.




Femap 11 includes support for VBOs

Up to an order of magnitude performance improvement in the dynamic rotation of large models

Depends on graphics card, graphics memory, and the model – can use large amounts of graphics memory




Model Description Performance Improvement

1600 solids – each solid is a 100x1x1 brick with the four long edges filleted to .1 radius

Model 1 in 10.3.1/64 with no vertex arrays 440ms, in dev 64 release 50ms (8.8 times faster)

1600 solids – each solid is a sphere of radius 1

Model 2 in 10.3.1/64 with no vertex arrays 1213ms, in dev 64 release 270ms (4.5 times faster)

640,000 quad4 elements Model 3 in 10.3.1/64 with no vertex arrays 427ms, in dev 64 release 408ms but with VBO on, 64ms (6.3 times faster) and uses about 151MB of graphics memory

1,919,488 tetra10s – 16 solids of 100x100x1 block – each block has 119,968 elements

Model 4 in 10.3.1/64 with no vertex arrays 746ms, in dev 64 release 750ms but with VBO on, 130ms (5.7 times faster) and uses about 252MB of graphics memory

*AMD v3900 card



Femap 11 Graphics Performance Improvements

Limits of Performance on Dell Precision Mobile Workstation I7-2860QM – 2.5 GHz 16 GB RAM nVidia M2000 – 2GB RAM

Graphics

Multiple Copies of the Boeing ISS Laboratory Module

4.5M Nodes and Elements

Dynamic rotation performance using VBOs: ~8x faster, V10.3 to v11



Femap 11 Graphics Performance Improvements

Benefits Increased productivity with faster graphics performance Dynamic rotation of large models >5x faster using VBOs



Femap 11Working with Legacy FE Models

It is sometimes necessary to work with legacy FE models for which there is no underlying geometry available, only the FE mesh Performing model updates to such models or simply changing the

mesh density is difficult and time consuming Error prone: danger of not adhering to the original geometry topology

The solution: Femap’s create geometry from mesh capability



Femap 11Create Geometry from Mesh

Create surface geometry from existing shell meshes when there is no underlying geometry available Easily make model changes to existing meshes Easily remesh existing FE models Model topology maintained Automatic mesh / geometry associativity

Mesh New Geometry New Mesh




Workflow:

Import FEA input file…




Workflow:

Create surfaces from patches of elements using Femap’s selection methods…




Workflow:

Stitch the surfaces together…




Workflow:

Add cutouts, stiffener locations, whatever modifications are required…




Workflow:

Re-mesh the geometry to create a new FE model




Benefits Increased productivity

Easier to remesh or make model changes to legacy FE models for which there is no underlying geometry available

Less error prone When making model changes or

remeshing original model topology is maintained



Femap 11External Superelements

What is a superelement? Represents a portion of a FE model SE defined by nodes (interior points) Connects and reduces to boundary points Exact static reduction Additional dofs added for dynamic reduction Analysis is performed on residual structure

Superelement(SEID=70)

Residual Structure(SEID=0)

K, M B, P

70

0

Reduce upstream SEs to residual structure

Perform analysis on residual structure

Data recovery of upstream SEs




How are superelements used?

Break a large model into substructures and analyze it piece by piece

Reduce model size for advanced analyses like nonlinear and dynamics (analysis only performed on residual)

Conveniently split a model up for organizational reasons

Share model information while maintaining confidentiality – external superelements




What is an external superelement?

Matrix representation of a componentor substructure: [K], [M], [B], {P}

Transfer model representation without compromising confidentiality – no geometry or FE model data included

Winglet Model

Common node attachment points




Winglet External Superelement

Winglet: create external superelement

Transfer SE data to wing OEM

Wing: attach the external SE in the assembly run



Set up the creation of external superelements Creates the EXTSEOUT and ASSIGN statements Creates SPOINT/QSET entries on the fly for modal analysis (CMS)





Set up for the inclusion of external superelements in subsequent assembly runs (Superelement license required) Automatically creates the ASSIGN statement



Femap 11NX Nastran 8.5: External Superelements

External superelement loads Static loads are now stored with external superelements

Load matrix {Pa} written out in the user-specified format Column sorted to match load IDs Results data can be recovered in the system run with SELOAD bulk

data entry





Easier to create and assemble external superelements Easier management of NX Nastran input reference entries

Less prone to error All NX Nastran file management and external superelement entries

are created automatically



Femap 11XY Plotting Considerations

Increasing model size and corresponding quantity of results data lead to increasing difficulty in timely results comprehension and understanding of model behavior XY plotting is a crucial component in results processing

The solution Streamlining and extension of Femap’s XY plotting capability



Femap 11Streamlined XY Plotting

New XY Plotting Interface Enhanced graphics Unlimited number of curves can be displayed at the same time Any number of charts can be saved to the database

Future development Extension to a full charting capability

Additional chart types – spline, bar, pie




XY plotting based on data series Different groups for different data series Different beginning and ending output

sets for transient data View Femap functions

Modern charting interface in a fully functional Femap pane

Context sensitivity: right-click access to features and controls Title: font, location etc. Axes: logarithmic, grid lines, tick marks,

hide Background, colors, style Markers: size, shape Labels: data values

Tooltip querying





Easier creation of XY plots Faster and easier comprehension of analysis results Easier report creation



Femap 11NX Nastran Integration

Solid composite modeling PCOMPS physical property for

composites modeling with hexa and penta solid elements

MATFT definition for failure theory material constants

Benefits of solid composites Offer a more geometrically precise

representation More accurate interlaminar shear

stresses than a 2D laminate representation



Femap 11NX Nastran Integration: Solid Composites

Solid composite modeling (cont.) Ply layup modeled with solid hexas and pentas (linear and parabolic) 1 to n plies per element Ply thickness is relative Ply failure theories:

Tsai-Wu, Hill, Maximum Stress, Hoffman, LaRC02 Interlaminar failure theories:

Shear and Normal



Femap 11NX Nastran Integration: Bolt Preloads for Solids

Bolt preloads for solid elements Extension of beam element bolt

preload modeling capability Represent preloaded bolts with

solid hexa and penta elements Region definition with preload loadingBenefit More detailed stress recovery

in and around bolt locations



Femap 11NX Nastran Integration: Nonstructural Mass

Nonstructural mass regions Mass definition independent of

structural model Define mass regions based on:

Geometry (curves, surfaces) Elements (pbeam, pshell,

psolid) Apply mass per area or length; total mass on area or length Mass regions are controlled within subcase level

Benefits Easier control and distribution of nonstructural mass Can apply differing mass distributions in a single run



Femap 11NX Nastran Integration: Variable Acceleration Load

ACCEL entity Static acceleration load definition Allows different acceleration loads

over different parts of the model

Benefits Easier to simulate combined rotational

and translational accelerations Example applications:

Space systems



Femap 11NX Nastran Integration: MCID

MCID: specify shell element material angle definition by coordinate system ID Easy to specify material angle

across many elements regardless of their orientation

MCID x-axis is projected ontoelements



Femap 11NX Nastran Integration: Linear Contact Buckling

Linear contact in buckling solutions Standard contact regions Set buckling solution in Analysis

Manager Postprocessing reveals

eigenvalue and eigenvector taking contact regions into consideration



Femap 11NX Nastran Integration

Option to preserve INCLUDE statements Entities in the included data are not

added to the Femap database Interfaces preference

Support for PARAM,BAILOUT Prevents bailout of solution due to errors

for model checking Nastran bulk data option

Create ASSIGN statements in Analysis Text dialog in Analysis Manager



Femap 11Customer Driven Enhancements

Mesh edge split Easy mesh splitting

by selecting two nodeson an element edge

Split propagates through the model maintaining a contiguous mesh

Define limit split regions to controlmesh splitting

Splits hexa and penta solids,shells and beams




Mesh splitting: shell and beam model Automatically splits any beams encountered




Global plies Automatically create

global plies as you are creating a layup




New Add Connected Elements element selection method in the Entity Selection dialog Selects picked elements and all the elements to

which they connect

Pick Elements Add Connected Elements




Model Info tree scrolling Easier navigation and scrolling through

long lists of entities like properties and materials

Set maximum number of entities to display in File / Preferences

Scroll using Previous / Next controls With pointer over visibility checkboxes:

Scroll using mouse wheel Scroll using <CTRL> and <SHIFT>

shortcuts with mouse wheel




Database cleanup during save added to release any unused space Automatically compresses database reducing database size by freeing

up previously used space e.g. after results output has been deleted

Copy / Move to Set command added for loads and constraints Allows easier load and constraint definition

set up within set definitions




Ability to show up to 2 additional output vectors• Show results on line, shell, and solid elements at the same time• Show results on different types of elements with same topology (i.e.,

beam, bar, and rod results) all in one plot.




Redesigned Select Postprocessing Data dialog Filters added to aid output set and vector data selection




Results enveloping Quick results envelope creation directly from the Model Info tree



Q and A

femap 11.0(wn)

Documents

siemens plm

legacy fe

file attach

buffer objects

siemens ag

data series

graphics memory

modfemmodel