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1、NastranInHyperMesh,therearetwotypesofloadcollectorsforNastran:•Specificloadcollectorswithacardimage•GenericloadcollectorswithoutacardimageGenericloadcollectorsareusedtocollectloadsandconstraintsfordisplaypurposesandtoassignanIDtotheloads.Specificloadcollectorsareusedforspecializedloadingcards,su
2、chasSPCADD,MPCADD,EIGRL,EIGB,EIGC,EIGP,EIGR,FREQ,FREQ1,LOAD,GRAV,RFORCE,andTEMPD. Specificloadcollectorshavecardimageswhichcanbeeditedtodothefollowing:•Groupotherloadcollectorstogetherforsimultaneousapplicationinasinglesubcase•Providespecialinformationforaspecificanalysistype(suchasmodalanalysis
3、)Generalboundaryconditions,suchasloadsandconstraints,shouldnotbecollectedintospecificloadcollectors.WhenreadinginaNastrandeck,loadsthathavethesameSIDarecollectedintothesameloadcollector. IfaloadcollectoralreadyexistsinthedatabasewiththesameSID,oneofthefollowingcanoccur:Ifoverwriteisoff(default),
4、thenewloadcollector’sIDisoffsetandallloadsinthatcollectorwillhaveanewSIDuponexport.Ifoverwriteison,thenewloadcollectorreplacestheexistingloadcollector. Theoriginalloadcollectorandtheloadsitcontainsaredeleted.SupportedCardsSolverDescriptionSupportedParametersHyperMeshNotesDAREADefinesscale(area)f
5、actorsforstaticanddynamicloads. SupportedasconstraintsDELAYDefinesthetimedelaytermintheequationsofthedynamicloadingfunction SupportedasconstraintsDLOADDefinesadynamicloadingconditionforfrequencyresponseortransientresponseproblemsasalinearcombinationofloadsetsdefinedviaRLOAD1orRLOAD2entriesforfre
6、quencyresponseorTLOAD1orTLOAD2entriesfortransient responseDPHASEDefinesthephaseleadtermintheequationofthedynamicloadingfunction SupportedasconstraintsEIGBDefinesdataneededtoperformbucklinganalysis EIGCDefinesdataneededtoperformcomplexeigenvalueanalysis EIGPDefinespolesthatareusedincomplexeige
7、nvalueextractionbytheDeterminantmethod EIGRDefinesdataneededtoperformrealeigenvalueanalysis EIGRLDefinesdataneededtoperformrealeigenvalue(vibrationorbuckling)analysiswiththeLanczosmethod FREQDefinesasetoffrequenciestobeus
