ls-dyna3天培训

LSLS--DYNADYNA培训教程培训教程姜正旭姜正旭MSC.SoftwareMSC.Software上海办事处上海办事处目录ƒ简介ƒ应用的例子ƒ求解输入文件基础ƒ用LS-Prepost进行前后处理ƒ接触目录ƒ材料•塑性模型•泡沫•复合材料•地质材料•超弹材料•专业材料•离散梁单元材料目录ƒ沙漏ƒ单元公式ƒ刚体和连接ƒ重启动ƒ时间步长和质量缩放ƒ非正常终止和结果评估ƒ点焊模拟目录ƒ应力初始化(预载荷)ƒ阻尼ƒ网格自适应和糙化ƒ部件分析ƒ气囊ƒ碰撞分析建模指导总结ƒ练习LS-DYNA中其它的分析类型ƒ隐式分析(短期课程)ƒ静态分析ƒ瞬态动力学分析ƒ特征值和间隙的特征值分析(自然模态)ƒ约束和附着模态扩展ƒ线性分析ƒ屈曲分析ƒ热和热/结构耦合分析ƒ有流体/结构相互作用的可压缩Euler/ALE分析(短期课程)ƒ不可压缩CFDƒ无网格方法(短期课程)ƒEFG(ElementFreeGalerkin)ƒSPH(SmoothParticleHydrodynamics)LIVERMORESOFTWARETECHNOLOGYCORPORATIONLIVERMORESOFTWARETECHNOLOGYCORPORATIONLS-DYNA是什么?ƒ最初的开发是用于对承受冲击载荷作用的结构进行非线性应力分析ƒ现在,是一个多场分析程序…•流体-结构耦合(Lagrangian/Euler/ALE)•热分析和热-结构耦合分析•隐式分析功能(静态分析,隐式动态分析,特征值分析,线性分析)ƒ…具有很好的并行处理能力•SMP(SharedMemoryParallel)•MPP(MassivelyParallelProcesing)LIVERMORESOFTWARETECHNOLOGYCORPORATIONLIVERMORESOFTWARETECHNOLOGYCORPORATION应用ƒ防撞性分析(汽车,船舶,火车,等.)ƒ乘员安全性ƒ金属冲压成型和体积成型过程模拟ƒ汽轮机叶片包容性和鸟撞分析ƒ空间飞行器起落架性能ƒ宇航飞行器弱点/破坏性评估ƒ结构的抗震性ƒ武器设计&爆炸模拟ƒ生物力学模拟(关节/骨头,头/脑,心,肺)ƒ工业事故(核燃料桶跌落)ƒ消费品/包装跌落和冲击分析ƒ体育设备的性能分析LIVERMORESOFTWARETECHNOLOGYCORPORATIONLIVERMORESOFTWARETECHNOLOGYCORPORATIONLSTC公司背景ƒPublicdomainDYNA3D,Dr.JohnO.Hallquist/LawenceLivermoreNationalLaboratory,1976•武器模拟ƒLSTCandLS-DYNA3DfoundedbyDr.Hallquistin1988•公认的商业应用的市场ƒInthe1990’s…•LS-DYNA2D和LS-DYNA3D结合在一起(LS-DYNA)•隐式能力(LS-NIKE3D)加入到LS-DYNA•热分析能力(TOPAZ)加入到LS-DYNA•加入MPP能力•加入Eulerian/ALE单元公式和Euler/Lagrange耦合•加入LS-POST,LS-OPTLIVERMORESOFTWARETECHNOLOGYCORPORATIONLIVERMORESOFTWARETECHNOLOGYCORPORATIONLSTC公司背景ƒ自2000,•扩充了MPP能力•加入无网格方法•更多的线性单元公式•LS-POST扩充了前处理功能(LS-PREPOST)ƒ世界各地的销售商:US,UK,Nordiccountries,France,Germany,Italy,Netherlands,Japan,Korea,China,Taiwan,India,Brazil;alsothroughANSYSandMSC.ƒ40+全职雇员+众多顾问ƒTroy,MichiganbranchofLSTCopened2003ƒLS-DYNA当前的版本是970ƒLS-DYNA正在开发的版本:971,980LIVERMORESOFTWARETECHNOLOGYCORPORATIONLIVERMORESOFTWARETECHNOLOGYCORPORATIONLS-DYNA的信息源ƒLSTCftpsite(ftp.lstc.com)•PleasecontactyourLS-DYNAdistributorforaccessto:•Latestproductionsoftware•Manuals•Exampleinputdecks•HybridIIIdummymodelsƒWebSites()•Shortcourseofferings•AVIlibrary•DocumentationdownloadsƒNewsletter()ƒHelpPages()ƒLS-DYNAConferencePapers()ƒTechnicalSupport(LS-DYNAdistributor,[e-mail])LSLS--DYNADYNA应用实例应用实例„„跌落跌落//冲击冲击„„碰撞碰撞„„气囊气囊„„Euler/ALEEuler/ALE应用应用ƒƒ轮胎打滑轮胎打滑ƒƒ水面冲击水面冲击ƒƒ高能炸药爆炸高能炸药爆炸ƒƒ金属拉伸金属拉伸„„金属成型金属成型„„隐式分析隐式分析„„无网格方法无网格方法(SPH,EFG)(SPH,EFG)„„热热//结构耦合分析结构耦合分析ll玩具跌落玩具跌落对讲机跌落对讲机跌落电视跌落电视跌落ApplicationApplication––DroptestDroptest„„RollofCoinsRollofCoinsApplicationApplicationApplicationApplication--AutomotiveAutomotive„„FrontalCrashwithTruckFrontalCrashwithTruckApplicationApplication--AutomotiveAutomotive„„有假人的卡车碰撞有假人的卡车碰撞ApplicationApplication--AutomotiveAutomotive„„„„InteractionofHeadwithAirbagInteractionofHeadwithAirbag有孔的折叠袋有孔的折叠袋––EulerianEulerian方法方法16CPUsMPP1day1processor2weeks16CPUsMPP1day1processor2weeksNoticeholeinfabric螺旋折叠的气囊展开－使用螺旋折叠的气囊展开－使用EulerEuler方法方法Fluid-structureinteraction:CouplesthemotionofaLagrangiannodetothemotionofthematerialpointinsidetheEulerian/ALEmeshusingapenalty-basedalgorithmFluid-structureinteraction:CouplesthemotionofaLagrangiannodetothemotionofthematerialpointinsidetheEulerian/ALEmeshusingapenalty-basedalgorithmEulerianFluid轮胎打滑模拟的流体-结构相互作用CourtesyofTheYokohamaTireCoLtd.轮胎打滑模拟的流体-结构相互作用CourtesyofTheYokohamaTireCoLtd.CourtesyofTheYokohamaTireCoLtd.LagrangianStructurevoidwater(NoTireTranslation)(NoTireTranslation)打滑模拟CourtesyofTheYokohamaTireCoLtd.打滑模拟CourtesyofTheYokohamaTireCoLtd.CourtesyofTheYokohamaTireCoLtd.(Tiretranslates)(Tiretranslates)Moving(ALE)ReferenceSystemCourtesyofTheYokohamaTireCoLtd.Moving(ALE)ReferenceSystemCourtesyofTheYokohamaTireCoLtd.CourtesyofTheYokohamaTireCoLtd.ApplicationApplication--AerospaceAerospaceSimulationprovidedcourtesyofPurdueUniversity,CivilEngineeringDept.,SozenandKilic水下爆炸水下爆炸„„CoupledEuler/LagrangeSimulationCoupledEuler/LagrangeSimulationHH--SectionExtrusion(SectionExtrusion(EulerianEulerian))ToolsnotshownApplicationApplication--MetalFormingMetalForming„„TubeBendingTubeBending„„TubeTubeHydroformingHydroformingMetalFormingwithHMetalFormingwithH--adaptivityadaptivity„„FormingofDoorPanelFormingofDoorPanelseveredynamiceffectsduringearlystagesofcompletelyexplicitformingsimulationChannelSimulationChannelSimulationwithImplicit/ExplicitSwitchingwithImplicit/ExplicitSwitching„„ApplicationApplication––ImplicitImplicitSteeringSystemSteeringSystem„„StaticNonlinearAnalysis:StaticNonlinearAnalysis:ƒƒ*CONSTRAINED_JOINT_UNIVERSAL,RACK_AND_PINION,TRANSLATIONAL*CONSTRAINED_JOINT_UNIVERSAL,RACK_AND_PINION,TRANSLATIONALƒƒ*MAT_GENERAL_JOINT_DISCRETE_BEAM*MAT_GENERAL_JOINT_DISCRETE_BEAMmodeldetails12,000nodes21,000equationsmemory=8m(64Mbyte)performance14nonlinearsteps1cpu:18minImplicittubecrushImplicittubecrushImplicittubecrushImplicittubecrushNonlinearStress-StrainCurvePlasticStrainat2secondsSpeed=5530m/sSpeed=5530m/sExperimentExperimentSimulationSimulation刚球和铝板的超高速碰撞SPH(SmoothParticleHydr