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1、一、直齒輪最好用三齒模型，這樣可以減少網(wǎng)格的數(shù)量。PLANESTRESS定義單元厚度及常體積應(yīng)變選項的選取。PLANESTRAIN定義單元厚度，常體積應(yīng)變、假定應(yīng)變選項的選取。二、關(guān)于loadcase的參數(shù)：、STATIC包括CONTACT在內(nèi)的靜力分析。BUCKLE屈曲特征值求解。CREEP蠕變分析。DYNAMICMODAL固有振動頻率求解。DYNAMICTRANSIENT動力響應(yīng)分析。DYNAMICHARMONIC簡諧響應(yīng)分析。SPECTRUMRESPONSE頻譜響應(yīng)分析。BODYAPPROACH接觸分析時剛體移動RI
2、GIDPLASTIC剛塑性分析。HEATTRANSFERANALYSIS（熱傳導(dǎo)分析）Associatedwiththerigidbodyisapointlabeledthecentroid.Whenthefirsttwomethodsarechosen,youdefinethetranslationalmotionofthispoint,andtheangularmotionaboutanaxisthroughthispoint.Thedirectionoftheaxiscanbedefinedforthree-dime
3、nsionalproblems.Fortwo-dimensionalproblems,itisalinenormaltotheplane.Forcomplextime-dependentbehavior,theMOTIONusersubroutinecanbeusedtoprescribethemotionasanalternativetotheinput.Themotionduringatimeincrementisconsideredtobelinear.Thepositionisdeterminedbyanexpli
4、cit,forwardintegrationofthevelocitiesbaseduponthecurrenttimestep.Atimeincrementmustalwaysbedefinedevenifastatic,rate-independentanalysisisperformed.Whenloadcontrolledrigidbodiesareused,twoadditionalnodes,calledthecontrolnodes,areassociatedwitheachrigidbody.In2-Dpr
5、oblems,thefirstnodehastwotranslationaldegreesoffreedom(correspondingtotheglobalx-andy-direction)andthesecondnodehasonerotationaldegreeoffreedom(correspondingtotheglobalzdirection).In3-Dproblems,thefirstnodehasthreetranslationaldegreesoffreedom(correspondingtogloba
6、lx-,y-,andz-direction)andthesecondnodehasthreerotationaldegreesoffreedom(correspondingtotheglobalx-,y-,andz-direction).Inthisway,bothforcesandmomentscanbeappliedtoabodybyusingthePOINTLOADoptionforthecontrolnodes.Alternatively,onemayprescribeoneormoredegreesoffreed
7、omofthecontrolnodesbyusingtheFIXEDDISPorDISPCHANGEoptions.Generallyspeaking,load-controlledbodiescanbeconsideredasrigidbodieswiththree(in2-D)orsix(in3-D)degreesoffreedom.Theprescribedpositionandprescribedvelocitymethods(seeFigure8-9)havelesscomputationalcoststhant
8、heprescribedloadmethod(seeFigure8-10).注意：在Marc中，不管是默認(rèn)路徑還是存的文件名都不要有空格或中文字符，否則會導(dǎo)致文件打不開，或提交后一直running等后果。360保險箱會導(dǎo)致Patran點擊打開就退出。在Jobresult中要在Postfile中設(shè)置生成b
