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小方坯连铸机振动装置偏心轴模态分析 Title:ModalAnalysisofEccentricShaftinContinuousCastingVibrationDevice Introduction: Continuouscastingisahighlyefficientmethodusedinthesteelindustrytoproducehigh-qualitysteelproducts.Theprocessinvolvespouringmoltensteelintoawater-cooledcoppermold,whereitsolidifiesintoacontinuousstrand.However,duringthecontinuouscastingoperation,vibrationscanoccur,affectingthequalityandproductivityofthesteelproducts.Thisstudyfocusesonthemodalanalysisoftheeccentricshaftinacontinuouscastingvibrationdevicetounderstanditsdynamicbehaviorandoptimizetheoperatingconditions. Methods: Themodalanalysisisconductedtodeterminethenaturalfrequencies,modeshapes,anddampingratiosofthevibrationdevice.Thefiniteelementmethod(FEM)isusedtomodelandsimulatetheeccentricshaftanditssupportingstructure.TheANSYSsoftwareisemployedforthenumericalanalysis,wherefour-nodeshellelementsareusedtomodeltheeccentricshaftandbeamelementsareusedforthesupportstructure.Thematerialproperties,suchasYoung'smodulusanddensity,areassignedtoeachelement,andappropriateboundaryconditionsareimplementedtosimulatetheactualoperatingconditions. ResultsandDiscussion: Themodalanalysisrevealsthenaturalfrequenciesoftheeccentricshaftandprovidesvaluableinsightsintoitsdynamiccharacteristics.Theresultsshowthattheeccentricshafthasmultiplenaturalfrequencies,indicatingthepresenceofmultiplemodesofvibration.Eachmoderepresentsadifferentpatternofmotionandcanbevisualizedthroughtheirmodeshapes.Themodalanalysisalsodeterminesthedampingratios,whicharecrucialforevaluatingtheenergydissipationandstabilityofthesystem. Thefirstfewnaturalfrequenciesandtheirmodeshapesarepresentedandanalyzedindetail.Thefrequencyandmodeshapeofthedominantmodeareofparticularinterest,asitcansignificantlyaffecttheperformanceandstabilityofthecontinuouscastingvibrationdevice.Themodeshapeshowsthattheeccentricshaftexperiencesbendingdeformation,whichisexpectedduetoitsgeometryandboundaryconditions.Themotionpatternandamplitudedistributionprovideinsightsintothepotentialcausesofvibrati