简介：Thewindenergyindustryhasbeengrowingrapidlyduringthepastdecades.Alongwiththisgrowth,engineeringproblemshavegraduallyemergedinthewindpowerindustry,includingthoserelatedtothestructuralreliabilityofturbinetowers.Thisstudyproposesarapidseismicanalysismethodologyforexistingwindturbinetowerstructures.Themethodisdemonstratedandvalidatedusingacasestudyona1.5MWtubularsteelwindturbinetower.Threefiniteelement(FE)modelsaredevelopedfirst.Fieldtestsareconductedtoobtaintheturbinetower’svibrationalcharacteristics.Thetestsinclude(1)remotelymeasuringthetowervibrationfrequenciesusingalongrangelaserDopplerVibrometerand(2)monitoringthetowerstructuralvibrationbymountingaccelerometersalongtheheightofthetubularstructure.In-situmeasurementsareusedtovalidateandupdatetheFEmodelsofthewindturbinetower.WiththeupdatedFEmodelthatrepresentsthepracticalstructuralconditions,seismicanalysesareperformedtostudythestructuralfailure,whichisdefinedbythesteelyieldingofthetubulartower.Thisresearchisanticipatedtobenefitthemanagementoftheincreasingnumberofwindenergyconvertersbyprovidinganunderstandingoftheseismicassessmentofexistingtubularsteelwindturbinetowers.