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结冰对风力发电机叶片模态参数影响的试验研究 Title:ExperimentalStudyontheImpactofIceFormationonModalParametersofWindTurbineBlades Abstract: Windenergyisanimportantsourceofrenewableenergy.However,theefficiencyandsafetyofwindturbinescanbeaffectedbyvariousfactors,includingiceformation.Inthisstudy,weconductedexperimentstoinvestigatetheimpactoficeformationonthemodalparametersofwindturbineblades.Themodalparameters,includingnaturalfrequenciesandmodeshapes,weremeasuredandanalyzedunderdifferenticingconditions.Theresultsprovideinsightsintothebehaviorofwindturbinebladesundericeloads,enhancingtheunderstandingoftheirstructuraldynamicsandenablingthedevelopmentofmoreefficientandreliablewindenergysystems. 1.Introduction Windenergyhasemergedasasignificantcontributortoglobalelectricitygeneration.Windturbinesutilizethekineticenergyofwindtoproduceelectricity.However,icingonwindturbinebladescanreducetheiraerodynamicefficiency,increasemechanicalloads,andposesafetyrisks.Iceformationsalterthestructuralpropertiesoftheblades,affectingtheirmodalparameters,suchasnaturalfrequenciesandmodeshapes.Understandingtheseeffectsiscrucialforoptimizingwindturbinedesignandoperationalstrategies. 2.LiteratureReview Previousstudieshaveexaminedtheeffectoficeonwindturbineperformance,butthereislimitedresearchontheimpactoficeonthemodalparametersofwindturbineblades.Thefewavailablestudieshaveshownthaticeformationcanaltertheblade'sdynamiccharacteristics.Thesestudiesmainlyusednumericalsimulationsortheoreticalapproaches,whichlackexperimentalvalidation.Therefore,thereisaneedforexperimentalinvestigationstobetterunderstandtheimpactoficeonthemodalparametersofwindturbineblades. 3.ExperimentalSetup Tostudytheimpactoficeformationonmodalparameters,ascaled-downwindturbineblademodelwasusedintheexperiment.Artificialicingtechniqueswereemployedtosimulateiceformationonthebladesurface.Thebladewassubjectedtovariousicingconditions,includingdifferenticethicknessesandspatialdistributions.Modaltestingequipment,suchasaccelerometers,straingauges,andascanninglase