Radioss version 11.0
- 1. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. RADIOSS Version 11.0 for Linear and Non-linear Analysis Altair Engineering – January 2011 Greg Harte – Program Manager Harold Thomas – Director of Solver Technology
- 2. Linear Statics, Dynamics, Buckling, Thermal, Plasticity, Quasi-static, Contact Non-Linear (Implicit) Quasi-static, Dynamics, The Power of ONE Post-buckling, Materials, Contact Non-Linear (Explicit) Impact, Thermal, Materials, Contact Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Thermal and CFD Fluid Structure Interaction (FSI), Thermal Stress, Multibody RADIOSS Multi-Body Dynamics (Rigid & Flexible Bodies) Kinematics, Static and Dynamic, Quasi-static RADIOSS is a Complete Finite Element Solution
- 3. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. HyperWorks for Analysis and Optimization RADIOSS the HyperWorks Solver Pre-Post 1-D Systems, Fatigue, Ergonomics, Industrial Non-Linear Non-Linear Thermal and Multi-Body Design, Injection Molding, Linear Dynamics Noise and Vibration (NVH), (Implicit) (Explicit) CFD Composite Materials, Electromagnetics RADIOSS - RADIOSS - Partner Alliance RADIOSS AcuSolve MotionSolve Solutions Optimization – OptiStruct and HyperStudy Data and Process Management
- 4. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. What’s New in RADIOSS 11.0 Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 5. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Platform Support • Windows (32 and 64 bit) • XP • Vista • Windows 7 • Linux (32 and 64 bit) • Red Hat • SUSE • SLES • IBM AIX • Solaris • Apple MAC OS X
- 6. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. What’s New in RADIOSS 11.0 Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 7. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Performance • SMP Parallel • All Analysis Types • SPMD Parallel • Linear Statics by Subcase • Buckling Analysis by Subcase • Direct Frequency Response by Frequency • Modal Frequency Response by Frequency • PCG Iterative Solver for Linear and Non-Linear Analysis • Dramatic reduction in run times for solid structures • Reduced Run Times • Frequency Response Analysis • NVH Analysis • CMS Super Element Generation • Reduced Memory Requirements • RADIOSS Memory released when AMLS is executed • Reduction in required memory for matrix assembly
- 8. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. What’s New in RADIOSS 11.0 Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 9. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. RADIOSS 11.0 Solutions Linear Solutions Non-Linear Solutions • Statics • Contact with Non-Linear Material Quasi- • Inertia relief Static Analysis • Fatigue Analysis • Contact with Material and Geometric Non- • Thermal Analysis Linear Quasi-Static Analysis • Normal modes • Contact with Material and Geometric Non- • Buckling Analysis Linear Implicit Low Speed Transient Analysis • Complex Eigenvalue Analysis • Contact with Material and Geometric Non- • Frequency response Linear Explicit High Speed Transient Analysis • PowerFlow Analysis • Acoustic Analysis • Optimization • Transient Analysis • Random Response • Response Spectrum • Optimization
- 10. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Small Displacement Non-Linear Static Invoked with NLPARM or ANALYSIS = NLSTAT • Contact with small sliding • Grid to Grid/Element (CGAP and CGAPG) • Surface to Surface (CONTACT) • Contact Pressure output • Automatically considers shell thickness • Slide, Stick, and Freeze contact • Non-Linear Materials • MATS1, TABLES1, and TABELST • For Solid and Shell elements • Temperature dependency (TABLEST) • Results can be used for Buckling Analysis • Loading and unloading with SUBCASE continuation (CNTNLSUB) • Static Loading and Temperature
- 11. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Large Displacement Non-Linear Static Analysis ANALYSIS = NLGEOM • Additional Non-Linear Element and Material Properties • PSHELLX, PSOLIDX, etc. • MATX62, etc. • Many Non-Linear Material Models • Elastic-plastic • Hyper-elastic • Post-buckling (RIKS method) • Contact
- 12. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Non-Linear Implicit Transient Analysis ANALYSIS = IMPDYN • Additional Non-Linear Element and Material Properties • PSHELLX, PSOLIDX, etc. • MATX62, etc. • Contact • Many Non-Linear Material Models • Elastic-plastic • Hyper-elastic • Visco-elastic
- 13. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Non-Linear Explicit Transient Analysis ANALYSIS = EXPDYN • Additional Non-Linear Element and Material Properties • PSHELLX, PSOLIDX, etc. • MATX62, etc. • Contact • Many Non-Linear Material Models • Elastic-plastic • Hyper-elastic • Visco-elastic
- 14. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. What’s New in RADIOSS 11.0 Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 15. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Solver Integration with Concurrent Simulation • All analysis types available using the SUBCASE Bulk Data format MFREQ NLGEOM HEAT • Subcase selects solution sequence • Thermal Stress • Preload Frequency Response EXPDYN STATIC • Non-linear Geometry Explicit Dynamics • Complex load scenarios can be defined BULK DATA • Loadings can be sequential • Parallel analyses in one run Elements • True multi-disciplinary solver Materials • Integrated Properties • Parallelized Loads
- 16. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. What’s New in RADIOSS 11.0 Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 17. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Multi-Body Dynamics RADIOSS MBD solution sequence • Fully integrated MotionSolve • Kinematics analysis OptiStruct • Dynamic analysis • Static analysis • Quasi-static analysis Analysis • Full flexible body capabilities • Bulk Data Input • Pre-Processing from FE-Model in FEA Motion HyperMesh • Optimization with HyperMorph and HyperStudy
- 18. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Motion Solve Integration into RADIOSS Model Setup in HyperMesh • Body Definition thru meshed parts • MBD Element definition • Automatic creation of Flexible Bodies • Automated Solver execution (FEA and MBD) • Exported in Bulk Syntax Integrated Optimization in OptiStruct thru ESLM • Static Responses for Flexbodies • MBD System Level Responses
- 19. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Multi-Body Dynamics: Bulk Data Input
- 20. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Flexbody and CMS Super Element output • Flexbody output for LMS’ Virtual.Lab • PARAM, LMSOUT • Grid Point Stresses for Shells output to the MNF File • CMS Super Element and Stress Results for AVL/EXCITE • PARAM, EXCOUT • CMS Super Element for ROMAX • Written to PUNCH file using PARAM,EXTOUT,DMIGPCH • Interface to AcuSolve • Grid, Element, and modal data
- 21. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. What’s New in RADIOSS 11.0 Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 22. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Complex Eigenvalue Analysis Free vibration beyond normal mode analysis • Stiffness or mass matrix is not symmetric • Damped system • Viscous damping – Quadratic Eigen value problem • Structural damping – imaginary part of stiffness matrix • Typical application • Brake squeal analysis • Friction stiffness matrix is asymmetric input through K2PP
- 23. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. What’s New in RADIOSS 11.0 Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 24. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Response Spectrum Analysis Application to structures subjected to • Seismic loading • Explosions • Estimates maximum structural response from a dynamic excitation • Displacement • Stress • force • Dynamic excitation is specified by response spectra • Maximum response versus natural frequency of 1-DOF system • Typically provided in tabular input format (DTI, SPECSEL) by users • Table lookup to find modal response from response spectra • Combined modal response to estimate max structural response • Directional combination: ALG, SRSS • Modal combination: ABS, SRSS, CQC, NRL
- 25. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. What’s New in RADIOSS 11.0 Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 26. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Pre-Loaded Analysis Pre-Loaded Normal Modes • Raises or Lowers Natural Frequencies • Resulting Modes can be used for Frequency Response • Resulting Modes can be used for Transient Analysis
- 27. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Frequency Response Static load reference for FRF analysis • FORCE • MOMENT • PLOADx • GRAV • Interface with FastFRS solver • Developed by University of Texas • Distributed by CDH
- 28. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. NVH Acoustic Loads and Damping • Acoustic Source • ACSRCE • Acoustic Impedance (Acoustic Dampers) • MAT10 admittance • CHACAB, PACAB Solid Absorber Element • CAABSF, PAABSF Plate Absorber Element • Directional mass on bushings • PBUSH and PBUSHT • In addition to direction stiffness and directional damping. • Large mounts and bushings models are simplified to a single CBUSH, and all properties change accordingly when the part is modified (previously had to have rigid elements, concentrated masses, and bushings) • Forces recovered from the CBUSH capture all effects for TPA
- 29. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Super Element Generation Craig-Bampton Approach • Use “CBN” on the CMSMETH data • Interface DOF are Fixed (ASET or BNDFIX) General Method for CMS Super Element generation • Use “GM” instead of “CBN” on the CMSMETH data • Interface DOF can be Fixed (BNDFIX) • Interface DOF can be Free (BNDFREE) • A mixture of Fixed and Free DOF can be used.
- 30. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. NVH/Acoustics Advanced Features • Enforced motion with AMLS • Unique to RADIOSS • Alternative is to use large mass method • What is the right mass to use? • Advantages of direct implementation: • No numerical issues • No fake rigid body modes to ignore • Exact Results • Modal Damping can be Added to a CMS SE in the Residual Run • Unit System Definition (UNITS) • To determine the sound pressure reference value for dB or dBA based target specification • To establish meaningful cut-off thresholds • To pass unit information to a post-processing tool
- 31. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. NVH/Acoustics Results • Complete energy output • Energy output is an important tool for understanding the physics of vehicle vibration • ESE, EKE, EDE • CMSE, CMKE, CMDE (CMSENERGY) • MODALSE, MODALKE, MODALDE • For normal modes (except damping energies), modal FRF, and direct FRF (except for system modal energies) • GPFORCE output for FRF (.h3d, .op2 and .pch) • Transfer path analysis (TPA) requires transfer function and force output be in the same coordinate systems • Grid point force balance output ensures this requirement is met • PFGRID to .h3d file • Compact file format
- 32. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. NVH/Acoustics Output • Automatic result filtering (PEAKOUT) • Detailed results for peak response frequencies in a single run • Allows Number of Peaks, minimum cutoff and minimum spacing between peaks to be specified • Without this, since frequencies with peak Dynamic Response are not known ahead of time, a second run must be made to get detailed results output • Super Element participation factors (PFCMS) • This makes it possible to output trimmed body or sub- frame modal participation to a full vehicle response • Component modal targets required to meet full vehicle response needs can then be determined • Subcase specific PEAKOUT, PFGRID and PFMODE
- 33. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. PowerFlow Analysis Powerflow Output • Visualize the energy path from excitation source to mounts. • Can be used with 2D (Body) or 3D (Powertrain) structures
- 34. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. Conclusion Platform Support Performance Solutions Solver Integration Multibody Dynamics Complex Eigenvalue Response Spectrum NVH Analysis Optimization
- 35. Copyright © 2010 Altair Engineering, Inc. Proprietary and Confidential. All rights reserved. RADIOSS: The Power of One Modern FEA Technology Noise, Vibration & Harshness Durability & Fatigue Life Cycle Scalability, Quality, Repeatability Optimization RADIOSS The power of ONE One solver, One result, One partner ONE product with complete capabilities.