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1、一、直齿轮最好用三齿模型，这样可以减少网格的数量。PLANESTRESS定义单元厚度及常体积应变选项的选取。PLANESTRAIN定义单元厚度，常体积应变、假定应变选项的选取。二、关于loadcase的参数：、STATIC包括CONTACT在内的静力分析。BUCKLE屈曲特征值求解。CREEP蠕变分析。DYNAMICMODAL固有振动频率求解。DYNAMICTRANSIENT动力响应分析。DYNAMICHARMONIC简谐响应分析。SPECTRUMRESPONSE频谱响应分析。BODYAPPROACH接触分析时刚体移动RI
2、GIDPLASTIC刚塑性分析。HEATTRANSFERANALYSIS（热传导分析）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，不管是默认路径还是存的文件名都不要有空格或中文字符，否则会导致文件打不开，或提交后一直running等后果。360保险箱会导致Patran点击打开就退出。在Jobresult中要在Postfile中设置生成b
