Radioss version 11.0

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

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

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


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


What’s New in RADIOSS 11.0

Platform Support

Performance

Solutions

Solver Integration

Multibody Dynamics

Complex Eigenvalue

Response Spectrum

NVH Analysis

Optimization


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


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


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


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


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


Non-Linear Implicit Transient Analysis

ANALYSIS = IMPDYN

• MATX62, etc.

• Contact

• Elastic-plastic
• Hyper-elastic
• Visco-elastic


Non-Linear Explicit Transient Analysis

ANALYSIS = EXPDYN

• MATX62, etc.

• Contact

• Elastic-plastic
• Hyper-elastic
• Visco-elastic


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


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


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


Multi-Body Dynamics: Bulk Data Input


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


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


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


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


Frequency Response

Static load reference for FRF analysis
• FORCE
• MOMENT
• PLOADx
• GRAV

• Interface with FastFRS solver
• Developed by University of Texas
• Distributed by CDH


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


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.


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


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


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


PowerFlow Analysis

Powerflow Output
• Visualize the energy path from excitation source to mounts.
• Can be used with 2D (Body) or 3D (Powertrain) structures


Conclusion

Platform Support

Performance

Solutions

Solver Integration

Multibody Dynamics

Complex Eigenvalue

Response Spectrum

NVH Analysis

Optimization


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.

Radioss version 11.0

Empfohlen

Empfohlen

Weitere ähnliche Inhalte

Andere mochten auch

Andere mochten auch (10)

Ähnlich wie Radioss version 11.0

Ähnlich wie Radioss version 11.0 (20)

Mehr von AltairKorea

Mehr von AltairKorea (20)

Kürzlich hochgeladen

Kürzlich hochgeladen (20)

Radioss version 11.0