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optistruct 官方学习手册.pdf
00a_COVER_OS
00b_CONTACTS_11
00c_PROGRAM_v12_20121218
01_CH1_INTRODUCTION_v12_20121218
02_CH2_THEORETICAL_BACKGROUND_v12_20121218
03_CH3_OPTIMIZATION_INTERFACE_AND_SETUP_v12_20121218
04_CH4_CONCEPT_DESIGN_v12_20121218
05_CH5_FINE_TUNING_DESIGN_v12_20121218
06_APPENDIX_A_COMPOSITE_PLATE_v12_20121218
02-contacts_12.pdf
Altair Engineering Contact Information
02-contacts_12.pdf
Altair Engineering Contact Information
www.altairhyperworks.com | HyperWorks is a division of
Altair Engineering Contact Information
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Copyright© Altair Engineering Inc. All Rights Reserved for:
HyperMesh® 1990-2013; HyperCrash® 2001-2013; OptiStruct® 1996-2013; RADIOSS®1986-2013; HyperView®1999-2013;
HyperView Player® 2001-2013; HyperStudy® 1999-2013; HyperGraph®1995-2013; MotionView® 1993-2013; MotionSolve® 2002-
2013; HyperForm® 1998-2013; HyperXtrude® 1999-2013; Process Manager™ 2003-2013; Templex™ 1990-2013; MediaView™
1999-2013; BatchMesher™ 2003-2013; TextView™ 1996-2013; HyperMath® 2007-2013; ScriptView™ 2007-2013; Manufacturing
Solutions™ 2005-2013; HyperWeld® 2009-2013; HyperMold® 2009-2013; solidThinking® 1993-2013; solidThinking Inspire™
2009-2013; solidThinking Evolve™ 1993-2013; Durability Director™ 2009-2013; Suspension Director™ 2009-2013; AcuSolve®
1997-2013; and AcuConsole® 2006-2013.
In addition to HyperWorks® trademarks noted above, GridWorks™, PBS GridWorks®, PBS Professional®, PBS™, PBS Works™
and Portable Batch System® are trademarks of ALTAIR ENGINEERING INC. All are protected under U.S. and international laws
and treaties. Copyright© 1994-2013.
Additionally, the Altair software is protected under patent #6,859,792 and other patents pending.
All other marks are the property of their respective owners.
ALTAIR ENGINEERING INC. Proprietary and Confidential. Contains Trade Secret Information. Not for use or disclosure outside of
ALTAIR and its licensed clients. Information contained in HyperWorks® shall not be decompiled, disassembled, or “unlocked”,
reverse translated, reverse engineered, or publicly displayed or publicly performed in any manner. Usage of the software is only as
explicitly permitted in the end user software license agreement.
Copyright notice does not imply publication.
Table of Contents
OptiStruct Optimization
Analysis, Concept and Optimization
Table of Contents .................................................................................................................... 1
Chapter 1: Introduction ............................................................................................ 7
1 – HyperWorks Overview ............................................................................................... 7
1.1 – HyperWorks Tool Descriptions ............................................................................... 8
1.2 – OptiStruct Integration with HyperWorks ................................................................ 10
2 – OptiStruct Overview ................................................................................................ 11
2.1 – Finite Element Analysis ........................................................................................ 11
2.2 – Multi-body Dynamic Analysis ................................................................................ 12
2.3 – Structural Design and Optimization ...................................................................... 12
2.4 – Case Studies ........................................................................................................ 15
2.4.1 – Lightweight SUV Frame Development ............................................................... 15
2.4.2 – Optimization Process of a Torsion Link .............................................................. 16
Chapter 2: Theoretical Background ...................................................................... 17
1 – Optimization ............................................................................................................ 17
1.1 – Design Variable .................................................................................................... 17
1.2 – Response ............................................................................................................. 19
1.2.1 – Subcase Independent Response ....................................................................... 19
1.3 – Objective Function ................................................................................................ 25
1.4 – Constraint Functions............................................................................................. 25
2 – Gradient-based Optimization ................................................................................... 29
2.1 – Gradient Method ................................................................................................... 30
2.2 – Sensitivity Analysis ............................................................................................... 31
2.3 – Move Limit Adjustments ....................................................................................... 35
3
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2.4 – Constraint Screening ............................................................................................ 35
2.4.1 – Regions and Their Purpose ............................................................................... 37
2.5 – Discrete Design Variables .................................................................................... 38
Exercise 2.1: Getting Started using Inspire .................................................................... 39
Exercise 2.2: Topology Optimization Using Multiple Load Cases in Inspire ................... 55
Chapter 3: HyperMesh Optimization Interface ..................................................... 97
1 – Model Definition Structure ....................................................................................... 97
1.1 – Input/Output Section ............................................................................................. 98
1.2 – Subcase Information Section .............................................................................. 101
1.3 – Bulk Data Section ............................................................................................... 101
2 – Optimization Setup ................................................................................................ 102
2.1 – Optimization GUI ................................................................................................ 102
2.2 – Design Variable [ DTPL] ..................................................................................... 103
2.3 – Responses [DRESP1] ........................................................................................ 104
2.4 – Dconstraints [DCONSTR] ................................................................................... 105
2.5 – Obj. reference [DOBJREF] ................................................................................. 106
2.6 – Objective [DESOBJ] ........................................................................................... 107
2.7 – Table entries [DTABLE] ...................................................................................... 108
2.8 – Dequations [DEQATN] ....................................................................................... 109
2.9 – Discrete DVs [DDVAL] ........................................................................................ 110
2.10 – Opti. control [DOPTPRM] ................................................................................. 111
2.11 – Constr. Screen [DSCREEN] ............................................................................. 112
3 – How to Setup an Optimization in HyperMesh ........................................................ 113
Chapter 4: Concept Design ................................................................................. 119
1 – Topology Optimization .......................................................................................... 119
1.1 – Homogenization method ..................................................................................... 120
1.2 – Density method .................................................................................................. 120
HyperWorks 12.0
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4
Exercise 4.1 – Topology Optimization of a Hook with Stress Constraints .................... 121
Exercise 4.2 – Topology Optimization of a Control Arm ............................................... 129
Exercise 4.3: Pattern Repetition using Topology Optimization ..................................... 135
2 – Topography Optimization ...................................................................................... 141
2.1 – Design Variables for Topography Optimization ................................................... 141
2.1.1 – Variable Generation ......................................................................................... 142
2.1.2 – Multiple Topography Design Regions .............................................................. 143
Exercise 4.4 – Topography Optimization of an L-Bracket Including Autobead
Reinterpretation ........................................................................................................... 147
3 – Free-size Optimization........................................................................................... 155
Exercise 4.5 – Free-size optimization of Finite Plate with hole .................................... 161
4 – Design Interpretation - OSSmooth ......................................................................... 169
4.1 – OSSmooth Input Data ........................................................................................ 171
4.2 – Running OSSmooth ........................................................................................... 173
4.3 – Interpretation of Topography Optimization Results ............................................. 174
4.4 – Shape Optimization Results, Surface Reduction and Surface Smoothing ........... 175
Exercise 4.6 – OSSmooth surfaces from a topology optimization ................................ 177
Chapter 5: Fine-Tuning ........................................................................................ 181
1 – Size Optimization .................................................................................................. 181
1.1 – Design Variables for Size Optimization ............................................................... 182
Exercise 5.1 – Size Optimization of a Rail Joint ........................................................... 183
Exercise 5.2 – Discrete Size Optimization of a Welded Bracket .................................. 191
2 – Shape Optimization ............................................................................................... 199
2.1 – Design Variables for Shape Optimization ........................................................... 200
2.2 – HyperMorph ....................................................................................................... 201
2.2.1 – The Three Basic Approaches to Morphing ....................................................... 201
Exercise 5.3 – Cantilever L-beam Shape Optimization ................................................ 203
Exercise 5.4 – Shape Optimization of a Rail Joint ....................................................... 229
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3 – Free-shape Optimization ....................................................................................... 229
3.1 – Defining Free-shape Design Regions ................................................................. 229
3.2 – Free-shape Parameters ...................................................................................... 231
3.2.1 – Direction type .................................................................................................. 231
3.2.2 – Move factor ..................................................................................................... 232
3.2.3 – Number of layers for mesh smoothing ............................................................. 232
3.2.4 – Maximum shrinkage and growth ...................................................................... 233
3.2.5 – Constraints on Grids in the Design Region ...................................................... 234
Exercise 5.5 – Free-shape Optimization of a Compressor Bracket .............................. 237
Exercise 5.6 - Shape Optimization of a 3-D Bracket using the Free-shape Method .... 245
Appendix A ........................................................................................................... 255
HyperWorks 12.0
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6
Chapter 1: Introduction
Chapter 1
Introduction
1- HyperWorks Overview
HyperWorks®, A Platform for Innovation™, is an enterprise simulation solution for rapid
design exploration and decision-making. As one of the most comprehensive CAE solutions
in the industry, HyperWorks provides a tightly integrated suite of best-in-class tools for:
o Modeling
o Analysis
o Optimization
o Visualization
o Reporting
o Performance data management.
Based on a revolutionary “pay-for-use” token-based business model, HyperWorks delivers
increased value and flexibility over other software licensing models.
Below we list the applications that are part of HyperWorks, for extra information about them
go to www.altairhyperworks.com web page or go to HyperWorks online documentation.
HyperWorks 12.0
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OptiStruct Optimization 7
Chapter 1: Introduction
1.1 – HyperWorks Tool Descriptions
Finite Element Meshing and Modeling
HyperMesh
HyperCrash
BatchMesher
Multi-body Dynamics Modeling
MotionView
Solvers
RADIOSS
MotionSolve
OptiStruct
Post-processing and Data Analysis
HyperView
HyperGraph
HyperGraph 3D
HyperView Player
Study and Optimization
HyperStudy
Data Management and Process Automation
Altair Data Manager
Process Manager
Assembler
Universal finite element pre- and post-processor
Finite element pre-processor for automotive crash and
safety analysis
Geometry cleanup and auto-meshing in batch mode for
given CAD files
Multi-body dynamics pre- and post-processor
Finite element solver for linear and non-linear problems
Multi-body dynamics solver
Design and optimization software using finite elements
and multi-body dynamics
High performance finite element and mechanical
system post-processor, engineering plotter, and data
analysis tool
Engineering plotter and data analysis tool
Engineering 3-D plotter and data analysis tool
Viewer for visualizing 3-D CAE results via the Internet
or desktop
Integrated optimization, DOE, and robustness engine
A solution that organizes, manages, and stores CAE
and test data throughout the product design cycle
Process automation tool for HyperWorks and third
party software; Processes can be created with the help
of Process Studio.
A tool that enables CAE analysts to manage, organize,
and control their CAE mesh data
OptiStruct Optimization 8
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HyperWorks 12.0
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