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裂纹转子系统动力学特性与性能评价.docx

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裂纹转子系统动力学特性与性能评价 Title:DynamicsCharacteristicsandPerformanceEvaluationofCrackedRotorSystems Abstract: Rotorsystemsarecommonlyusedinvariousindustries,includingautomotive,aerospace,andpowergeneration.However,theoccurrenceofcracksinrotorsystemscansignificantlyaffecttheirdynamiccharacteristicsandperformance.Thispaperaimstoexplorethedynamicscharacteristicsofcrackedrotorsystemsandevaluatetheirperformancethroughvariousmethods. 1.Introduction: Rotorsystemsplayacrucialroleinmanyengineeringapplications,suchasturbineengines,electricmotors,andcompressors.Thepresenceofcracksinrotorsystemscanleadtocatastrophicfailures,posingserioussafetyrisksandeconomiclosses.Therefore,understandingthedynamicscharacteristicsofcrackedrotorsystemsandevaluatingtheirperformanceisofutmostimportance. 2.CrackModeling: Thefirststepinstudyingthedynamicsofcrackedrotorsystemsistodevelopanaccuratecrackmodel.Dependingonthecrack'slocationandorientation,variouscrackmodelscanbeused,includingtransverse,axial,andinclinedcracks.Additionally,thecrack'sdepthandlengthshouldbeconsideredtoaccuratelyrepresentthesystem'sbehavior. 3.DynamicAnalysis: Oncethecrackmodelisestablished,dynamicanalysescanbeperformedtodeterminethechangesinthesystem'smodalproperties,suchasnaturalfrequencies,modeshapes,anddampingratios.Severalmethods,suchasfiniteelementanalysis,analyticalmodeling,andexperimentalmodalanalysis,canbeemployedtoinvestigatethedynamicbehaviorofthecrackedrotorsystem. 4.ParametricStudies: Parametricstudiescanbeconductedtoexaminehowdifferentcrackparameters,suchascrackdepth,length,andlocation,affectthedynamiccharacteristicsoftherotorsystem.Theobjectiveistogaininsightsintothesensitivityofthesystem'sresponsetocrackparametersandidentifycriticalcracksizesthatleadtosignificantchangesinthesystem'sbehavior. 5.FaultDiagnosisTechniques: Toevaluatetheperformanceofcrackedrotorsystemsanddetectcracksatanearlystage,faultdiagnosistechniquesplayavitalrole.Vibrationanalysis,acousticemissiontechniques,andnon-destructiveevaluationmethods,suchase