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1、11.3.ExportingtoADAMSAfterbuildingthemodelinANSYS(includingallinterfacepoints),thenextstepistoinvoketheANSYS-ADAMSInterfacetocreatethemodalneutralfile,Jobname.MNF.CreationofthisfileisdrivenbyanANSYScommandmacrocalledADAMS.MAC.Tostarttheinterface,selectthefollowingGUIpath.MainMenu
2、>Solution>ADAMSConnection>ExporttoADAMSTheSelectInterfacePointsdialogboxappearsfirst.Fromthisdialogbox,youmustselecttwoormoreinterfacepoints.NoteDonotchoosetoomanyinterfacepointssinceonepointgivesriseto6degreesoffreedominADAMS.Toomanyinterfacepointsmayleadtohugefilesandmodels.Aft
3、eryouconfirmyourselectionbypickingOK,theExporttoADAMSdialogboxappears.Figure 11.2 ExporttoADAMSDialogBox图形在打开的对话框中，Completethefollowingstepsusingthisdialogbox.1.SystemofModelUnits:TheunitsusedforthemodelisimportanttotheADAMSprogram,whereasANSYSonlyrequiresthatyouuseaconsistentse
4、tofunits.Theunitschosenwillbewrittentothe.MNFfileandcanberecalledwiththeADAMS/Flexmodule.Ifnounitsarespecified,ADAMSassumesthatthesameunitswereusedinANSYSastheoneschosenintheADAMSmodel.Seethe/UNITScommandfordetails.Ifyouspecifyuserdefinedunits,aDefineUserUnitsdialogboxwillappearf
5、oryoutoinputtheconversionfactors(forlength,mass,force,andtime)betweenSIunitsandyourchosenunits.Belowisanexampleofuserdefinedunitsinwhichthecomponenthasbeenmodeledusingmillimeter,tonne(metricton),newton,andsecond.LengthFactor=1meter/millimeter=1000MassFactor=1kilogram/tonne=0.001F
6、orceFactor=1newton/newton=1TimeFactor=1second/second=11.NumberofModestoExtract:Inputthenumberofnormalmodestocompute.Normalmodesaretheeigenmodesofthecomponentwithalldegreesoffreedomofallinterfacepointsfixed.Thenumberofnormalmodesdependsonthefrequencyrangeoftheexcitationyouwillappl
7、yinyourADAMSmodel.Youmustchooseasufficientnumberofmodestorepresentyourstructureinthatfrequencyrange.InADAMS,ifyouhavechosentoomanynormalmodes,youareabletodeactivateeigenmodesbasedonthefrequencyoranenergycriterion.2.ElementResults:Specifywhetherornottheprogramshouldwritestressand/
8、orstrainresults.Thisoptionhasnoeffectont
