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1、利用Hypermesh和nastran创建mnf流程1.建立几何模型，定义材料属性、单元属性。2.创建约束和特征值卡，如下：约束为无量纲。定义为mis1,选择下列四点确定一个节点集定义。定义单元集。特征值为EIGRL特征。3.对控制卡进行设置（1）sol（2）PARAMParamfixedb-1ParamautospcyesParampost，0(3)case_unsupported_cards一般有以下部分：ADAMSMNFFLEXBODY=YES,OUTGSTRN=YES,OUTGSTRS=yes，EXPORT=BOTHRESVEC=yes，STRFIELD=AL
2、LGPSTRESS=all**要求节点应力输出GPStrain（plot）=all**要求节点应变输出Stress（PLOT）=all**要求单元应力输出STRAIN(FIBER,PLOT)**要求单元应变输出OUTPUT(POST)**分界符Set101=all**为面或者体定义单元集SURFACE102SET101（**上面定义的单元集）FIBER=Z1，NORMALzSet103=allVolume104set103,direct**定义实体单元集的体积(4)bulk_unsupported_cardsDTI,UNITS,1,KG,N,M,S(5)global_
3、case_controlOutput栏中点选EIGRL卡Super=1Method=1Stress（plot）=allStrain（fiber，plot）=allGpstress=allGpstrain=allCreateanMDDBusingMDNastranMDDBcanbecreatedinthesamewasascreatingMNF.Anewoption,EXPORT,isaddedtoADAMSMNFcardtospecifytheoutputoption.ADAMSMNFFLEXBODY=YESEXPORT=MNF/DB/BOTHMNF:generate
4、modalneutralfileDB:generateMDDBBOTH:generatebothMNFandDBPleaserefertoMDNastranQuickReferenceGuideandReferenceManualfordetails.UseFlexToolkittoconvertMNFtoMDDBUsecanalsousethemnf2mtxutilitytoconvertMNFtoMDDB.Theusageis:adamsflextkmnf2mtxsource.mnf-Odest.MASTERwheresource.mnfisthemnfyouwa
5、nttoconvertanddest.MASTERistheDatabasename.Ifdest.MASTERexists,mnf2mtxwillappendtheflexiblebodyinsource.mnftodest.MASTER.SousercancombineMNFsintooneMDDBusingmnf2mtx.Forexample,adamsflextkmnf2mtxsource1.mnf-Odest.MASTERthenadamsflextkmnf2mtxsource2.mnf-Odest.MASTERwillappendtheflexiblebo
6、dyinsource2.mnftodest.MASTERwithINDEX=2.相关主题PopupPopup另请参阅PopupTranslatingFEModelData>TranslatingMSC.NastranDataTranslatingMSC.NastranDataTherearetwodifferentinterfacesthatyouusetotranslateMSC.NastrandataforuseinAdams/Flex.Learnabout:•UsingMSC.Nastran2004andAbove•UsingMSC.Nastran69.x,70
7、.x,or2001•VerifyingtheModel•ComputingMSC.NastranStress/StrainModes•MSC.NastranXDBSupportforStress/StrainModes•ShortenedStress/StrainModesUsingMSC.Nastran2004andAboveStartinginversion2004,MSC.Nastranprovidesanimprovedinterfaceforgeneratingamodalneutralfile(MNF).ThenewMSC.Nastran
