有限元屈曲分析

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1、1NODESX^NSYS■「3120120:25:08Cwc«l有限元作业：非线性屈曲分析一：建立模型，给定边界条件。在这一步中，建立计算分析所需要的模型，定义单元类型，材料性质，创建单元，给定边界条件。如图1-5QPreferencesforCUIFiltering[KZTI](/PHaTM]Pr«f«r

2、mal厂AKTSRmd厂FLOTRAICFDl^netic^IodalMs厂EleeUicMot•:IfMindividualdxsciplines«rtselectedthey・11allxhov21225142Onlystrvcturtl♦!>*・nttyp«str«ihovnL>breryofElwntTypeiEleatntlyptr«f«r

3、olid-ShtllConilrtmlHypx・“，ticElttiic4nod«638nod・934nod・1818nod<281Hyptr4nodel818nod・281Pittite4nod«43Elastic4nodt63Ctncel1NODESANSYSDEC312012HtitriftlModelsDefinedM«t«rx*1ModelsAvtiltblta!ModelNumber1Favorit*sQLinearIsotropicPropertiesforlater・•it-iso)T1Ttnptr«tur«z

4、EX3.Ie9PRXYIMAddTgpwturo

5、Do】。toTcmp®rfttur«GrtphLin«Solution>-AnalysisType-NewAnalysis,单击"Static”来选中它然后单击OK。图62、择菜单路径MainMenu>S

6、olution>UnabridgedMenu>AnalysisOptionSo出现对话框，单击Largedeformeffectsoption（大变型效应选项）使之为ON,然后单击OK。图7[2StaticorSteady-StateAnalysisNonlinearOptions-LWlArliUMJLargederormertects0On[NROPT]Newton~RaphsonoptionProgramchosenzJ—AdaptivedescentONifnecessaryziE[STAOPT]VTSpeedupNo

7、2LinearOptions[LUMPM]Uselumpedmassapprox?No[EQSLV]EquationsolverProgramChosenzlTolerance/Level--validforallexceptSparseSolverMultiplier-0~validonlyforPreconditionCGMatrixfiles-DeleteuponFINISHzi■validonlyforSparse[PRECISION]SinglePrecision-rOff"validonlyforPrecondit

8、ionCG[MSAVE]MemorySave"roff•validonlyforPreconditionCG[PCGOPT]LevelofDifficulty-ProgramChosenp■validonlyforPreconditionCG[PCGOPT]ReducedI/O-ProgramChosen73-validonlyforPreconditionCG[PCGOPT]MemoryMode-ProgramChosen-validonlyforPreconditionCG[PIVCHECK]PivotsCheckPOn•

9、validonlyforSparseandPCGSolversOKCancelHelp1▼三:在结点1的Y方向施加一个大小为・250的力操作步骤：Mainmenu>Solution-Load-Apply>Force/Moment>0nNodes,图8-9图9四：设置载荷步选项