Top mount动态特性精确仿真研究

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1、10532S1502W0246U463.1Topmount201851110532S1502W0246Topmount20185112018519DynamiccharacteristicsaccuratesimulationstudyofTopmountbyAIChaoB.E(CentralSouthUniversity)2015AthesissubmittedinpartialsatisfactionoftheRequirementsforthedegreeofMasterofEngineeringinVehicleEng

2、ineeringintheGraduateSchoolofHunanUniversitySupervisorProfessorLIUDihuiSeniorEngineerRAOZhiguoMay201812()ITopmountTopmount1)2)3)TopmountTopmountTopmount15%20.2%4)TopmountTopmountTopmount11.55%8.78%20.2%13.85%TopmountIIAbstractRubbermaterialsarewidelyusedinautomobile

3、s.Theirdynamiccharacteristicshaveagreatinfluenceonthesmoothness,handlingstabilityandNVHcharacteristicsofautomobiles.Therefore,howtoestablishahigh-precisiondynamicmodelforvirtualprototypingtoobtainthecompletedynamiccharacteristiccurveofrubbercomponentsandtheoptimizat

4、ionofviscoelasticmaterialparametersareofgreatsignificanceinguidingthedevelopmentofrubbercomponents.ThisarticlemainlystudiesthedynamiccharacteristicsofTopmount.Themainresearchcontentsareasfollows:1)Introducetheviscoelasticconstitutivetheoryofrubbermaterials.Fromtheba

5、sicformoftheviscoelasticconstitutivemodel,threetypicalviscoelasticconstitutiveequationsarestudied:complexmodel,standardrheologicalmodelandfractionalderivativemodel.Differenttypesofconstitutiveequationshavedifferentrangesofapplicationandhavetheirownadvantagesandlimit

6、ations.Thecenterofresearchisthefractionalderivativeconstitutivemodel.2)Studythedynamicpropertiesofrubbermaterials.Studyingthechangesinthemechanicalpropertiesofrubbermaterialsafterconsideringtheviscoelasticpropertiesofthematerials,includingcreep,stressrelaxation,freq

7、uencydependence,andtemperaturedependence.Determinetheviscoelasticmodeloftherubberelementinthetimeandfrequencydomainandcalculatetheconstitutivemodelparameters.3)PerformfiniteelementanalysisontheTopmountdynamics.ThefiniteelementmodeloftheTopmountisestablishedcompletel

8、yandstaticpropertiesanddynamiccharacteristicsofTopmountarestudiedbasedontheinitialviscoelasticitymaterialparameters.Thecalculationresultss