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前所未有的结构优化工具OptiStruct10.0Copyright©2006AltairEngineering,Inc.Allrightsreserved.2Today…Altair…Altair的技术愿景OptimizationisDriverinCAEDrivenDesignProcessCopyright©2006AltairEngineering,Inc.Allrightsreserved.3AltairOptiStruct——面向结构优化的革命性工具基于有限元技术的设计和分析工具•概念设计•仿真分析•细节优化集成线性有限元求解器在概念设计阶段•拓扑优化(Topologyoptimization)•形貌优化(Topographyoptimization)•自由尺寸优化(Free-sizeoptimization)设计改进阶段•形状优化(Shapeoptimization)•尺寸优化(Sizeoptimization)•自由形状优化(Free-shapeoptimization)Copyright©2006AltairEngineering,Inc.Allrightsreserved.4优化类型选择适合的优化类型来解决选择适合的优化类型来解决设计问题设计问题Copyright©2006AltairEngineering,Inc.Allrightsreserved.5OptimizationDisciplinesTopologyoptimizationTopologyoptimizationMethodtofindtheoptimummaterialdistributioninMethodtofindtheoptimummaterialdistributioninagivendesignspaceagivendesignspaceSolidSolidCopyright©2006AltairEngineering,Inc.Allrightsreserved.6OptimizationDisciplinesShellShellTopologyoptimizationTopologyoptimizationMethodtofindtheoptimummaterialdistributioninMethodtofindtheoptimummaterialdistributioninagivendesignspaceagivendesignspaceCopyright©2006AltairEngineering,Inc.Allrightsreserved.7OptimizationDisciplinesTopographyoptimizationTopographyoptimizationMethodtoevaluatetheoptimumbeadstructureonMethodtoevaluatetheoptimumbeadstructureonathinpartathinpartCopyright©2006AltairEngineering,Inc.Allrightsreserved.8形貌优化过程OptStruct给出最佳压延筋布局OptStruct给出最佳压延筋布局定义压延筋的尺寸参数和优化目标定义压延筋的尺寸参数和优化目标根据压延筋布局设计具体零件根据压延筋布局设计具体零件Copyright©2006AltairEngineering,Inc.Allrightsreserved.9OptimizationDisciplinesShapeoptimizationShapeoptimizationMethodtoautomaticallychangetheshapeofaMethodtoautomaticallychangetheshapeofagivenpartgivenpartCopyright©2006AltairEngineering,Inc.Allrightsreserved.10形状优化过程初始模型有限元分析对设计区域进行分区改变各设计分区的形状OptiStruct给出满足要求的最佳形状保存为形状变量Copyright©2006AltairEngineering,Inc.Allrightsreserved.11OptimizationDisciplinesSizeoptimizationSizeoptimizationMethodtoobtainoptimummodelparameter(e.gMethodtoobtainoptimummodelparameter(e.gmaterialproperties)materialproperties)Copyright©2006AltairEngineering,Inc.Allrightsreserved.12OptimizationDisciplinesSolvingthedesignSolvingthedesignproblembychoosingandproblembychoosingandcombiningtherightcombiningtherightoptimizationdisciplinesoptimizationdisciplinesCopyright©2006AltairEngineering,Inc.Allrightsreserved.13FunctionsofResponses面向优化的结构响应MinMaxMinMaxMaxMinResponse目标Response1LowerBoundConstraintUpperBoundConstraintResponsenLowerBoundConstraintUpperBoundConstraint约束Copyright©2006AltairEngineering,Inc.Allrightsreserved.14为什么要考虑制造加工约束？如果优化结果不能被制造，或者制造费用非常昂贵，优化结果就不具备工程实用价值OptiStruct充分考虑了优化结果的可加工性：•最小尺寸约束•最大尺寸约束•拔模方向约束•模式重复•对称约束•挤压工艺约束•压延筋模式重复•模式组•离散取值•…Copyright©2006AltairEngineering,Inc.Allrightsreserved.15最小尺寸约束考虑最小尺寸约束小于该最小尺寸的特征将被去除没有最小尺寸约束非常难以制造，或不能保证加工质量优化结果有网格依赖性Copyright©2006AltairEngineering,Inc.Allrightsreserved.16最大尺寸约束去除制造过程中不合理的材料...