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1、MetricsforNonlinearModelUpdatinginStructuralDynamicsMetricsforNonlinearModelUpdatingSamueldaSilvainStructuralDynamicsMember,ABCMsam_silva13@hotmail.comTheaimofthispaperistoperformacomparativestudybetweendifferentdistanceStateUniversityoftheWestofParaná-measuresormetricsforuseinnonline
2、armodelupdatingusingvibrationtestdata.Fourmetricsderivedfrombothfrequencyandtimedomainupdatingapproachesarestudied,UNIOESTEincludingtheharmonicbalancemethod,theconstitutiveequationerror,therestoringCentrodeEngenhariaseCiênciasExatasforcesurfaceandtheKarhunen-Loèvedecomposition.Inthefi
3、rstsection,abenchmarkFozdoIguaçu,PR,Brazil.modelwithlocalnonlinearstiffnessisdefinedinordertoillustrateeachmethod.Secondly,eachnonlinearupdatingmetricissuccinctlyreviewed.Finally,therelativeperformancesofthedifferentmetricsareinvestigatedbasedonnumericalsimulations.TheseresultsScottCo
4、ganallowustocharacterizetheapplicabilityandlimitationsofthedifferentapproaches.Keywords:nonlinearmodelupdating,harmonicbalance,constitutiverelationerror,scott.cogan@univ-fcomte.frrestoringforcesurface,Karhunen-LoèvedecompositionEmmanuelFoltêteemmanuel.foltete@univ-fcomte.frUniversitéd
5、eFranche-ComtéInstitutFEMTO-ST,DépartementLMARCBesançon,FranceFabriceBuffefabrice.buffe@cnes.frCentreNationald’EtudesSpatiales–CNESCentreSpatialdeToulouse31401Toulouse,Francelargerlinearfiniteelementmodel(FEM).BöswaldandLink(2004)IntroductionappliedtheHBmethodinasimilarwaytoupdatenonl
6、inearjointparameters.Themainadvantageofthismethodisthatitallowsusto1LocalmethodsforlinearmodelupdatingbasedonvibrationperformnonlinearupdatingusingFRFresiduals.However,theHBdataarewell-documentedintheliterature(FriswellandmethodfailswhenworkingwithcomplexnonlinearitiesduetotheMottersh
7、ead,1995).Ingeneral,thegoalistosolveaninverselossofinformationcausedbythelinearizationprocedure.probleminvolvingobjectivefunctionsthatrepresentcorrelationsAnotherlinearupdatingapproachinthefrequencydomainthatbetweentheexperimentalandnumericaldatafromamodelinwhichcanbeadaptedfornonline
8、arupd
