Predicting and simulating noise Integrated vibro- and aero- acoustic approach

Transcription

1 Predicting and simulating noise Integrated vibro- and aero- acoustic approach Simcenter 3D Acoustics Robin Boeykens Francois Iker Unrestricted Restricted Siemens AG AG Realize innovation.

2 Introducing Simcenter Portfolio for Predictive Engineering Analytics Simcenter PHYSICAL TWIN DIGITAL TWIN Page 2

3 Simcenter 3D 3D CAE for the digital twin Best-in-class simulation modeling Multi-discipline integration Openness and scalability Leading in system simulation Leverage industry expertise Page 3

4 Simcenter 3D 3D CAE for the digital twin Best-in-class simulation modeling Multi-discipline integration Openness and scalability Leading in system simulation Leverage industry expertise Page 4

5 Acoustic simulation Why is it important? Regulation: pass-by-noise, wayside, ICAO Acoustic comfort, Sound quality: part of brand Cost reduction E.g. less material Mass customization, Variant explosion Failure reduction Fuel economy Lightweight Page 5

6 Simcenter 3D Acoustics Engineering View: Source System Transfer Receiver Source System Receiver Mechanical Finite Element Vibro-Acoustics Structural Acoustics Electromagnetics Directivity Sensors Boundary Element Vibro-Acoustics Acoustic Contributions Functions Page 6

7 Vibro-Acoustics Engineering An end-to-end process 1) CAD-based pre 2) Structural meshing, assembly 3) Acoustics meshing, boundary conditions 5) Solving 6) Post-process: check requirements, get insights 4) Link with EM Page 7 7) What-if, optimization, feedback to designer

8 Simcenter 3D Acoustics Process View Geometry Preparation Meshing and Assembly Structural and Acoustics Pre Solving Post-processing Synchronous modeling, closing holes, removing blends, parts,... Assembly FEM, surface wrap, acoustic meshing, LBCs, advanced vibro-acoustics coupling, Acoustics Vibro-Acoustics FEM AML / FEMAO / ATV BEM Both vibrations and acoustics Contribution analysis What-if, optimization, feedback to designer Page 8

9 Simcenter 3D Acoustics Process View Geometry Preparation Meshing and Assembly Structural and Acoustics Pre Solving Post-processing Synchronous modeling, closing holes, removing blends, parts,... Assembly FEM, surface wrap, acoustic meshing, LBCs, advanced vibro-acoustics coupling, Acoustics Vibro-Acoustics FEM AML / FEMAO / ATV BEM Both vibrations and acoustics Contribution analysis Page 9

10 Create the Acoustics Mesh Using 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 Page 10

11 Simcenter 3D Acoustics Process View Geometry Preparation Meshing and Assembly Structural and Acoustics Pre Solving Post-processing Synchronous modeling, closing holes, removing blends, parts,... Assembly FEM, surface wrap, acoustic meshing, LBCs, advanced vibro-acoustics coupling, Acoustics Vibro-Acoustics FEM AML / FEMAO / ATV BEM Both vibrations and acoustics Contribution analysis Page 11

12 Simcenter 3D Multi-discipline integration TEST-CAE Correlation Structures NVH & Acoustics Thermal Flow Composites Motion Rotor Dynamics Durability Optimization 1D 3D Co-Simulation Multiphysics Linear FEM Non-Linear FEM BEM Multi-body Fatigue Thermal CFD Page 12

13 Real Loads Use as simulated or as measured load data for vibro-acoustic predictions Simcenter 3D Page 13

14 Real Loads Use as simulated or as measured load data for vibro-acoustic predictions Simcenter 3D Page 14

15 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 Page 15

16 Simcenter Portfolio for Predictive Engineering Analytics Combining Simulation and Test I. Test FOR Simulation II. Test WITH Simulation III. Simulation FOR Test Validate Simulation with real-life Tests & Combined use of Test and Simulation Simulation for productive & realistic Test IV. Throughout the Development Process and beyond f.i. coupling with Customer Usage IOT / Cloud / Data analytics Customer Usage data Customer Usage data Page 16

17 Punch Powertrain Using LMS Engineering services and tools to cut development time by a factor of 2 New motors generation for automotive propulsion Reduced total development time by at least 50 percent Developed new generation of motors with better NVH performance Implemented a new simulationbased process with knowledge transfer Switched reluctance motors challenge NVH performance Developing a powerful partnership Couple the vibro-acoustic model with the electromagnetic model Combine test and simulation for the creation of validated simulation models 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 Page 17

18 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 Page 18

19 NVH Electrification Predict structural and acoustic loading of an electric powertrain Restricted Siemens AG 2017 All rights reserved

20 Simcenter 3D Acoustics Process View Geometry Preparation Meshing and Assembly Structural and Acoustics Pre Solving Post-processing Synchronous modeling, closing holes, removing blends, parts,... Assembly FEM, surface wrap, acoustic meshing, LBCs, advanced vibro-acoustics coupling, Acoustics Vibro-Acoustics FEM AML / FEMAO / ATV BEM Both vibrations and acoustics Contribution analysis Page 20

21 Simcenter 3D Acoustics Technology View Finite Element Method (FEM) Acoustics domain by 3D, volumetric elements, AML Boundary Element Method (BEM) Acoustics domain by surface elements For Interior and/or Exterior enables fast solving Exterior enables efficient meshing Page 21

22 Simcenter 3D Acoustics Technology View Unique, AML technology and BEM technology Significant performance, lowering development cost Page 22

23 Simcenter 3D Acoustics AML (Automatically Matched Layer) 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 ρc AML Model size 500k DOFs 80k DOFs CPU time X s/freq X / 20 s/freq Page 23

24 Simcenter 3D Acoustics Technology View FEM AML FEMAO ATV Random Vibro-Acoustics Fast Multipole BEM H-Matrix BEM Page 24

25 Simcenter 3D Acoustics Technology View FEM AML FEMAO ATV Random Vibro-Acoustics Fast Multipole BEM H-Matrix BEM Page 25

26 Simcenter 12 Acoustics FEMAO FEM AO, the next generation FEM Acoustic solver Higher element order, automatically adapted by solver Full vehicle exterior acoustics Leaner models in pre-processing Faster at lower frequencies, more efficient at higher frequencies 2 to 10 x faster compared to FEM AML Submarine sonar scattering FEM mesh FEMAO mesh Page 26

27 FEMAO application example Prediction of acoustic transfer functions of an engine bay for pass-by noise Standard FEM FEMAO Frequencies Hz Hz Solving time 97 min 22 min FEM FEMAO Page 27

28 Simcenter 3D Acoustics Process View Geometry Preparation Meshing and Assembly Structural and Acoustics Pre Solving Post-processing Synchronous modeling, closing holes, removing blends, parts,... Assembly FEM, surface wrap, acoustic meshing, LBCs, advanced vibro-acoustics coupling, Acoustics Vibro-Acoustics FEM AML / FEMAO / ATV BEM Both vibrations and acoustics Contribution analysis Page 28

29 Simcenter 3D Acoustics Key Capabilities NX Nastran based FEM solution for Vibro-Acoustics Noise Radiation Sound Power ONE Model NASTRAN with SYSNOISE FEM Solver embedded ONE Pre/Post One Solve Structural Eigen Modes Vibration/Stress Page 29

30 Post-processing Contribution analysis Standard Post Contribution Analysis providing Focus 3D Images Grid Contributions Panel Contributions 3D Images and 2D Graphs Energy Contributions Modal Contributions Page 30

31 Simcenter 3D Acoustics Process View Geometry Preparation Meshing and Assembly Structural and Acoustics Pre Solving Post-processing Synchronous modeling, closing holes, removing blends, parts,... Assembly FEM, surface wrap, acoustic meshing, LBCs, advanced vibro-acoustics coupling, Acoustics Vibro-Acoustics FEM AML / FEMAO / ATV BEM Both vibrations and acoustics Contribution analysis What-if, optimization, feedback to designer Page 31

32 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 Page 32

33 Simcenter 3D Acoustics Process View Geometry Preparation Meshing and Assembly Structural and Acoustics Pre Solving Post-processing Synchronous modeling, closing holes, removing blends, parts,... Assembly FEM, surface wrap, acoustic meshing, LBCs, advanced vibro-acoustics coupling, Acoustics Vibro-Acoustics FEM AML / FEMAO / ATV BEM Both vibrations and acoustics Contribution analysis What-if, optimization, feedback to designer Page 33

34 Simcenter 3D Acoustics Application View Machinery Noise Radiation Engine, E-motor, compressor, pump.. Full Vehicle Radiation / Scattering Pass-by Noise, pedestrian safety, submarine scattering Duct (Vibro)Acoustics Intake/ exhaust/ muffler Transmission Loss, orifice noise and shell noise Enclosure / Panel Design Panel Transmission Loss, Insertion Loss Cabin Acoustics Cars, tractors, excavators Random Vibro-Acoustics Spacecraft Mission De-risking Page 34

35 Simcenter 3D Acoustics Application View Machinery Noise Radiation Engine, E-motor, compressor, pump.. Full Vehicle Radiation / Scattering Pass-by Noise, pedestrian safety, submarine scattering Duct (Vibro)Acoustics Intake/ exhaust/ muffler Transmission Loss, orifice noise and shell noise Enclosure / Panel Design Panel Transmission Loss, Insertion Loss Cabin Acoustics Cars, tractors, excavators Random Vibro-Acoustics Spacecraft Mission De-risking Page 35

36 Donaldson Enabling filtration systems provider to streamline acoustic studies Making noise reduction a priority 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 Insight into the acoustic behavior of the entire system Bring acoustic simulation in-house Use products and services Complete air intake systems development, optimized to meet rigorous noise limits 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 Page 36

37 Simcenter 3D Acoustics Application View Machinery Noise Radiation Engine, E-motor, compressor, pump.. Full Vehicle Radiation / Scattering Pass-by Noise, pedestrian safety, submarine scattering Duct (Vibro)Acoustics Intake/ exhaust/ muffler Transmission Loss, orifice noise and shell noise Enclosure / Panel Design Panel Transmission Loss, Insertion Loss Cabin Acoustics Cars, tractors, excavators Random Vibro-Acoustics Spacecraft Mission De-risking Page 37

38 John Deere Enabling resolving excessive cab noise Experimental and numerical acoustic analysis NVH testing Acoustics simulation 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 Use a combination of experimental and numerical acoustic analysis techniques Use LMS Engineering services and LMS software to identify and resolve issues 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 Page 38

39 Bobcat Company Fan Noise Prediction for Off-Highway Vehicle 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 Fan Noise Prediction for Off-Highway Vehicle Dirk von Werne, Siemens Industry Software; Prasanna Chaduvula, ; Patrick Stahl, Michael Jordan, Jamison Huber, Bobcat Company; Korcan Kucukcoskun, Mircea Niculescu, Siemens Industry Software, SAE international conference Page 39

40 Bobcat Company Fan Noise Prediction for Off-Highway Vehicle Process Flow Simulation vs Measurement MICROPHONES FAN CFD results Page 40 AML Micorphones

41 Bobcat Company Fan Noise Prediction for Off-Highway Vehicle Prediction of Sound Pressure Good correlation in most frequency bands Exterior Interior (different scale) Page 41

42 Simcenter 3D Acoustics Application View Machinery Noise Radiation Engine, E-motor, compressor, pump.. Full Vehicle Radiation / Scattering Pass-by Noise, pedestrian safety, submarine scattering Duct (Vibro)Acoustics Intake/ exhaust/ muffler Transmission Loss, orifice noise and shell noise Enclosure / Panel Design Panel Transmission Loss, Insertion Loss Cabin Acoustics Cars, tractors, excavators Random Vibro-Acoustics Spacecraft Mission De-risking Page 42

43 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 CAD Assembly Meshing Pre-processing Solver Post FEM BEM Acoustics Vibro-Acoustics Contributions What-if Optimization Data Management 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,... Page 43

44 Simcenter 3D Acoustics Acoustic simulation for the digital twin Realize innovation.