predicting and simulating noise€œthanks to lms engineering and the optimization process they used...
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Restricted © Siemens AG 2017
Predicting and simulating noiseIntegrated vibro- and aero- acoustic approach
Simcenter 3D AcousticsRobin Boeykens
Francois Iker
Realize innovation.Unrestricted © Siemens AG 2017
Unrestricted © Siemens AG 2017
Page 2 Siemens PLM Software
Introducing Simcenter™ Portfolio
for Predictive Engineering Analytics
Simcenter™DIGITAL TWINPHYSICAL TWIN
Unrestricted © Siemens AG 2017
Page 3 Siemens PLM Software
Simcenter 3D
3D CAE for the digital twin
Multi-discipline integration
Best-in-class simulation modeling
Openness and scalability
Leading in system simulation
Leverage industry expertise
Unrestricted © Siemens AG 2017
Page 4 Siemens PLM Software
Simcenter 3D
3D CAE for the digital twin
Multi-discipline integration
Best-in-class simulation modeling
Openness and scalability
Leading in system simulation
Leverage industry expertise
Unrestricted © Siemens AG 2017
Page 5 Siemens PLM Software
Acoustic simulation
Why is it important?
Acoustic comfort, Sound
quality: part of brand
Regulation: pass-by-noise,
wayside, ICAO
Cost reduction
E.g. less material
Mass customization,
Variant explosionFailure reduction
Fuel economy
Lightweight
Unrestricted © Siemens AG 2017
Page 6 Siemens PLM Software
Simcenter 3D Acoustics
Engineering View: Source – System Transfer – Receiver
ReceiverSystemSource
Mechanical Finite Element Vibro-Acoustics
Acoustic
Electromagnetics
Boundary Element Vibro-Acoustics
Structural Acoustics
Contributions
Directivity
Functions
Sensors
Unrestricted © Siemens AG 2017
Page 7 Siemens PLM Software
Vibro-Acoustics Engineering
An end-to-end process
1) CAD-based pre2) Structural meshing,
assembly
3) Acoustics meshing,
boundary conditions
6) Post-process: check requirements, get
insights
7) What-if, optimization, feedback to designer
4) Link with EM
5) Solving
Unrestricted © Siemens AG 2017
Page 8 Siemens PLM Software
Simcenter 3D Acoustics
Process View
Geometry
Preparation
Synchronous
modeling, closing
holes, removing
blends, parts,...
Meshing and
Assembly
Assembly FEM,
surface wrap,
acoustic
meshing,…
Structural and
Acoustics Pre
LBCs, advanced
vibro-acoustics
coupling,…
Solving
Acoustics
Vibro-Acoustics
FEM
AML / FEMAO / ATV
BEM
Post-processing
Both vibrations and
acoustics
Contribution analysis
What-if, optimization, feedback to designer
Unrestricted © Siemens AG 2017
Page 9 Siemens PLM Software
Simcenter 3D Acoustics
Process View
Geometry
Preparation
Synchronous
modeling, closing
holes, removing
blends, parts,...
Meshing and
Assembly
Assembly FEM,
surface wrap,
acoustic
meshing,…
Structural and
Acoustics Pre
LBCs, advanced
vibro-acoustics
coupling,…
Solving
Acoustics
Vibro-Acoustics
FEM
AML / FEMAO / ATV
BEM
Post-processing
Both vibrations and
acoustics
Contribution analysis
Unrestricted © Siemens AG 2017
Page 10 Siemens PLM Software
Create the Acoustics MeshUsing Wrapping Technology
Key highlights
- Create acoustic mesh (BEM
or FEM) of very complex
systems
- Start either from given mesh
or from given geometry
- Control key parameters such
as global resolution
- Contact prevention, local
resolution, auto refinement
constraint
Unrestricted © Siemens AG 2017
Page 11 Siemens PLM Software
Simcenter 3D Acoustics
Process View
Geometry
Preparation
Synchronous
modeling, closing
holes, removing
blends, parts,...
Meshing and
Assembly
Assembly FEM,
surface wrap,
acoustic
meshing,…
Structural and
Acoustics Pre
LBCs, advanced
vibro-acoustics
coupling,…
Solving
Acoustics
Vibro-Acoustics
FEM
AML / FEMAO / ATV
BEM
Post-processing
Both vibrations and
acoustics
Contribution analysis
Unrestricted © Siemens AG 2017
Page 12 Siemens PLM Software
Simcenter 3D
Multi-discipline integration
Structures
NVH &
Acoustics
Thermal
Flow
Composites
Motion
Rotor
Dynamics
Durability
Optimization
1D – 3D
Co-Simulation
TEST-CAE
Correlation
Multiphysics
Linear FEM Non-Linear FEM BEM Multi-body Fatigue Thermal CFD
Unrestricted © Siemens AG 2017
Page 13 Siemens PLM Software
Real LoadsUse ‘as simulated’ or ‘as measured’ load data for vibro-acoustic predictions
Simcenter 3D
Unrestricted © Siemens AG 2017
Page 14 Siemens PLM Software
Real LoadsUse ‘as simulated’ or ‘as measured’ load data for vibro-acoustic predictions
Simcenter 3D
Unrestricted © Siemens AG 2017
Page 15 Siemens PLM Software
Simcenter™ Engineering services – LMS & CD-adapco
Experience and global talent for valued customer partnerships
Troubleshooting
Co-development
Technology
transfer
Engineering
process
transformation
Performance
Engineering
Noise & Vibration
Durability
Fuel
consumption
Mechatronics
development
CFD
Combustion
Unrestricted © Siemens AG 2017
Page 16 Siemens PLM Software
Simcenter™ Portfolio for Predictive Engineering Analytics
Combining Simulation and Test
Validate Simulation with real-life Tests
I. Test FOR Simulation
Combined use of Test and Simulation
II. Test WITH Simulation III. Simulation FOR Test
Simulation for productive & realistic Test
&IV. Throughout the Development Process and beyond f.i. coupling with Customer Usage
Cu
sto
mer U
sag
e
data
Cu
sto
mer U
sag
e d
ata
IOT / Cloud /
Data analytics
Unrestricted © Siemens AG 2017
Page 17 Siemens PLM Software
New motors generation for automotive propulsion
Punch Powertrain
Using LMS Engineering services and tools to cut development time by a
factor of 2
• Reduced total development time by
at least 50 percent
• Developed new generation of
motors with better NVH
performance
• Implemented a new simulation-
based process with knowledge
transfer
“Thanks to LMS Engineering and the optimization process they used with LMS
Virtual.Lab, we are now working on a new generation of commercially competitive
switched reluctance motors for automotive propulsion.”
Diederik Brems, Mechanical Engineer
• Couple the vibro-acoustic model with the electromagnetic model
• Combine test and simulation for the creation of validated simulation models
Developing a powerful partnershipSwitched reluctance motors challenge NVH
performance
Unrestricted © Siemens AG 2017
Page 18 Siemens PLM Software
Punch Powertrain
Using LMS Engineering services and tools to cut development time by a
factor of 2
BELGIAN SOLAR TEAM THIRD IN WORLD
CHAMPIONSHIP FOR SOLAR CARS
NVH Electrification
Predict structural and acoustic loading of an electric powertrain
Restricted © Siemens AG 2017 All rights reserved
Unrestricted © Siemens AG 2017
Page 20 Siemens PLM Software
Simcenter 3D Acoustics
Process View
Geometry
Preparation
Synchronous
modeling, closing
holes, removing
blends, parts,...
Meshing and
Assembly
Assembly FEM,
surface wrap,
acoustic
meshing,…
Structural and
Acoustics Pre
LBCs, advanced
vibro-acoustics
coupling,…
Solving
Acoustics
Vibro-Acoustics
FEM
AML / FEMAO / ATV
BEM
Post-processing
Both vibrations and
acoustics
Contribution analysis
Unrestricted © Siemens AG 2017
Page 21 Siemens PLM Software
Boundary Element Method (BEM)Acoustics domain by surface elements
Simcenter 3D Acoustics
Technology View
Finite Element Method (FEM)Acoustics domain by 3D, volumetric elements, AML
For Interior and/or Exterior – enables fast solving Exterior – enables efficient meshing
Unrestricted © Siemens AG 2017
Page 22 Siemens PLM Software
Simcenter 3D Acoustics
Technology View
Unique, AML technology – and BEM technology
Significant performance, lowering development cost
Unrestricted © Siemens AG 2017
Page 23 Siemens PLM Software
Simcenter 3D Acoustics
AML (Automatically Matched Layer)
𝝆𝒄 AML
Model
size500k DOFs 80k DOFs
CPU
time
X
s/freq
X / 20
s/freq
• AML auto-creates layer at solver level, which fully absorbs
outwards traveling waves
• Yields accurate results in regular (red) FEM domain first
• Then, post-processing yields results outside the FEM domain
• Layer is allowed to be put very close to radiator
Lean and FAST FEM models
Unrestricted © Siemens AG 2017
Page 24 Siemens PLM Software
H-Matrix BEMRandom Vibro-Acoustics Fast Multipole BEM
FEMAO ATVFEM AML
Simcenter 3D Acoustics
Technology View
Unrestricted © Siemens AG 2017
Page 25 Siemens PLM Software
H-Matrix BEMRandom Vibro-Acoustics Fast Multipole BEM
FEMAO ATVFEM AML
Simcenter 3D Acoustics
Technology View
Unrestricted © Siemens AG 2017
Page 26 Siemens PLM Software
Simcenter 12 Acoustics
FEMAO
Full vehicle exterior acoustics
Submarine sonar scattering
FEM mesh FEMAO mesh
• FEM AO, the next generation FEM Acoustic solver
• Higher element order, automatically adapted by solver
• Leaner models in pre-processing
• Faster at lower frequencies, more efficient at higher frequencies
• 2 to 10 x faster compared to FEM AML
Unrestricted © Siemens AG 2017
Page 27 Siemens PLM Software
FEMAO application example
Prediction of acoustic transfer functions of an engine bay
for pass-by noise
Standard FEM FEMAO
Frequencies 100 – 2500 Hz 100 – 2500 Hz
Solving time 97 min 22 min
20
30
40
50
60
70
80
90
100 200 400 800 1600
FEM
FEMAO
Unrestricted © Siemens AG 2017
Page 28 Siemens PLM Software
Simcenter 3D Acoustics
Process View
Geometry
Preparation
Synchronous
modeling, closing
holes, removing
blends, parts,...
Meshing and
Assembly
Assembly FEM,
surface wrap,
acoustic
meshing,…
Structural and
Acoustics Pre
LBCs, advanced
vibro-acoustics
coupling,…
Solving
Acoustics
Vibro-Acoustics
FEM
AML / FEMAO / ATV
BEM
Post-processing
Both vibrations and
acoustics
Contribution analysis
Unrestricted © Siemens AG 2017
Page 29 Siemens PLM Software
Simcenter 3D Acoustics Key Capabilities
NX Nastran based FEM solution for Vibro-Acoustics
NASTRAN with SYSNOISE FEM Solver embedded
ONE Model
ONE Pre/Post
One Solve
Structural Eigen Modes Vibration/Stress
Noise Radiation Sound Power
Unrestricted © Siemens AG 2017
Page 30 Siemens PLM Software
Post-processing
Contribution analysis
Standard Post Contribution Analysis providing Focus
3D Images and 2D Graphs
3D Images
Grid Contributions
Energy Contributions
Panel Contributions
Modal Contributions
Unrestricted © Siemens AG 2017
Page 31 Siemens PLM Software
Simcenter 3D Acoustics
Process View
Geometry
Preparation
Synchronous
modeling, closing
holes, removing
blends, parts,...
Meshing and
Assembly
Assembly FEM,
surface wrap,
acoustic
meshing,…
Structural and
Acoustics Pre
LBCs, advanced
vibro-acoustics
coupling,…
Solving
Acoustics
Vibro-Acoustics
FEM
AML / FEMAO / ATV
BEM
Post-processing
Both vibrations and
acoustics
Contribution analysis
What-if, optimization, feedback to designer
Unrestricted © Siemens AG 2017
Page 32 Siemens PLM Software
Fast What-if
with Synchronous Technology
Key highlights
- Noise performances
indicators fully associative
with CAD: including
automatic re-meshing, LBCs
- Integrated extensive 3D
CAD modeling
- Synchronous Technology:
implement design
modifications without need
for history … and for ANY
CAD
Unrestricted © Siemens AG 2017
Page 33 Siemens PLM Software
Simcenter 3D Acoustics
Process View
Geometry
Preparation
Synchronous
modeling, closing
holes, removing
blends, parts,...
Meshing and
Assembly
Assembly FEM,
surface wrap,
acoustic
meshing,…
Structural and
Acoustics Pre
LBCs, advanced
vibro-acoustics
coupling,…
Solving
Acoustics
Vibro-Acoustics
FEM
AML / FEMAO / ATV
BEM
Post-processing
Both vibrations and
acoustics
Contribution analysis
What-if, optimization, feedback to designer
Unrestricted © Siemens AG 2017
Page 34 Siemens PLM Software
Random Vibro-AcousticsSpacecraft Mission De-risking
Enclosure / Panel DesignPanel Transmission Loss, Insertion Loss
Cabin AcousticsCars, tractors, excavators
Full Vehicle Radiation / ScatteringPass-by Noise, pedestrian safety,
submarine scattering
Duct (Vibro)AcousticsIntake/ exhaust/ muffler Transmission Loss,
orifice noise and shell noise
Machinery Noise RadiationEngine, E-motor, compressor, pump..
Simcenter 3D Acoustics
Application View
Unrestricted © Siemens AG 2017
Page 35 Siemens PLM Software
Random Vibro-AcousticsSpacecraft Mission De-risking
Enclosure / Panel DesignPanel Transmission Loss, Insertion Loss
Cabin AcousticsCars, tractors, excavators
Full Vehicle Radiation / ScatteringPass-by Noise, pedestrian safety,
submarine scattering
Duct (Vibro)AcousticsIntake/ exhaust/ muffler Transmission Loss,
orifice noise and shell noise
Machinery Noise RadiationEngine, E-motor, compressor, pump..
Simcenter 3D Acoustics
Application View
Unrestricted © Siemens AG 2017
Page 36 Siemens PLM Software
Making noise reduction a priority
Donaldson
Enabling filtration systems provider to streamline acoustic studies
• Saved significant time and money
by performing acoustic studies in
just hours
• Used acoustics know-how to
procure global R&D contracts
• Validate models and fine-tuned
overall approach to acoustics
testing
“LMS Engineering services have been with us every step of the way with technical
assistance to validate models and fine-tune our overall approach.”
Gert Proost, Engineering Manager
• Bring acoustic simulation in-house
• Use Siemens PLM Software products and services
Complete air intake systems development,
optimized to meet rigorous noise limits
Insight into the acoustic behavior of the
entire system
Unrestricted © Siemens AG 2017
Page 37 Siemens PLM Software
Random Vibro-AcousticsSpacecraft Mission De-risking
Enclosure / Panel DesignPanel Transmission Loss, Insertion Loss
Cabin AcousticsCars, tractors, excavators
Full Vehicle Radiation / ScatteringPass-by Noise, pedestrian safety,
submarine scattering
Duct (Vibro)AcousticsIntake/ exhaust/ muffler Transmission Loss,
orifice noise and shell noise
Machinery Noise RadiationEngine, E-motor, compressor, pump..
Simcenter 3D Acoustics
Application View
Unrestricted © Siemens AG 2017
Page 38 Siemens PLM Software
Experimental and numerical acoustic analysis
John Deere
Enabling resolving excessive cab noise
• Developed approach for addressing
acoustic issues early in the
development process
• Quickly and efficiently identified
effects that lead to loud cab noise
• Enabled better understanding of the
complex acoustic system
“We were able to identify the sensitivities of the different effects contributing to
the cab noise phenomenon much faster and more efficiently through our
cooperation with LMS Engineering services.”
Dr. Ing. Christian von Holst, Group Leader, Suspension Systems
• Use a combination of experimental and numerical acoustic analysis techniques
• Use LMS Engineering services and LMS software to identify and resolve issues
Acoustics simulationNVH testing
Unrestricted © Siemens AG 2017
Page 39 Siemens PLM Software
Bobcat Company
Fan Noise Prediction for Off-Highway Vehicle
“Fan Noise Prediction for Off-Highway Vehicle”
Dirk von Werne, Siemens Industry Software; Prasanna Chaduvula, Siemens PLM Software; Patrick
Stahl, Michael Jordan, Jamison Huber, Bobcat Company; Korcan Kucukcoskun, Mircea Niculescu,
Siemens Industry Software, SAE international conference 2017.
• Siemens worked together with Bobcat/Doosan on
building a simulation model of a off-highway cooling
device
• Computational Fluid Dynamics – CFD and
acoustics FEA are used
• Validation of measurement vs Simulations is
also performed
Unrestricted © Siemens AG 2017
Page 40 Siemens PLM Software
Bobcat Company
Fan Noise Prediction for Off-Highway Vehicle
Simulation vs Measurement
MICROPHONES
FAN – CFD results
Process Flow
AML Micorphones
Unrestricted © Siemens AG 2017
Page 41 Siemens PLM Software
Bobcat Company
Fan Noise Prediction for Off-Highway Vehicle
Exterior Interior (different scale)
Prediction of Sound Pressure Good correlation in most frequency bands
Unrestricted © Siemens AG 2017
Page 42 Siemens PLM Software
Random Vibro-AcousticsSpacecraft Mission De-risking
Enclosure / Panel DesignPanel Transmission Loss, Insertion Loss
Cabin AcousticsCars, tractors, excavators
Full Vehicle Radiation / ScatteringPass-by Noise, pedestrian safety,
submarine scattering
Duct (Vibro)AcousticsIntake/ exhaust/ muffler Transmission Loss,
orifice noise and shell noise
Machinery Noise RadiationEngine, E-motor, compressor, pump..
Simcenter 3D Acoustics
Application View
Unrestricted © Siemens AG 2017
Page 43 Siemens PLM Software
Simcenter Acoustics Key Capabilities
Unique Combination of Process Efficiency and Expertise
Simcenter 3D provides a highly efficient end-to-end process
complemented with high fidelity simulations
FEM
BEM
Acoustics
Vibro-Acoustics
Range: structural and acoustics meshing, synchronous modeling, FEM & BEM, contribution analysis,…
Depth: Acoustic Technologies: FEM AML, Automatic FSI, FEM AO, Fast Multipole BEM, H-Matrix BEM,...
AssemblyCAD Meshing Pre-processing Solver Post
Contributions
What-if
Optimization
Data
Management
Simcenter 3D AcousticsAcoustic simulation for the digital twin
Realize innovation.Unrestricted © Siemens AG 2017
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