摘要
Theoptimalmatrixmethodandoptimalelementalmethodusedtoupdatefiniteelementmodelsmaynotprovideaccurateresults.Thissituationoccurswhenthetestmodalmodelisincomplete,asisoftenthecaseinpractice.Animprovedoptimalelementalmethodispresentedthatdefinesanewobjectivefunction,andasabyproduct,circumventstheneedformassnormalizedmodalshapes,whicharealsonotreadilyavailableinpractice.Tosolvethegroupofnonlinearequationscreatedbytheimprovedoptimalmethod,theLagrangemultipliermethodandMatlabfunctionfminconareemployed.Todealwithactualcomplexstructures,thefloat-encodinggeneticalgorithm(FGA)isintroducedtoenhancethecapabilityoftheimprovedmethod.Twoexamples,a7-degreeoffreedom(DOF)mass-springsystemanda53-DOFplanarframe,respectively,areupdatedusingtheimprovedmethod.Thcexampleresultsdemonstratetheadvantagesoftheimprovedmethodoverexistingoptimalmethods,andshowthatthegeneticalgorithmisaneffectivewaytoupdatethemodelsusedforactualcomplexstructures.
出版日期
2004年01月11日（中国期刊网平台首次上网日期，不代表论文的发表时间）
