武汉理工大学博七学位论文
Abstract
ThevehiclepowertrainiSamulti.freedomtorsionalvibrationsytem,anditstorsionalvibrationandnosiedecreasethesafety
11letorsionalvibrationofthevechilepowertrainandcomfortablenessofavehicle.originatesfromthefluctuationofenginerotatingspeedandtorque.Thetraditionalclutchdamperhasfinitedampingperformanceduetoitsspacestructureconstraint.DualMassFlywheelfOMF),asanewtypetorsionaldamper,hasfavorablework
appliedintoperformance,andtheniswidlythepassengercarsinoverseas.However,thepresentstatusofdevelopmentin
BasedonthisfieldstillrestonthetheoryresearchstageinChina.domesticandabroadrcsearchresultsanddevelopmenttrendaboutDMF,theCircumferentialarcspringDualMassFlywheel(cs-DMF)istakenforthestudyobjectinthisthesis.themethodofDMFisfurther
rotaryinertiastudied,whichincludescoefficientascertain,optimization
arcofeachtorsionalstiffnessandelasticcharacteristicsofCiteumferential
Firstofall,thetwo
underidlingspring.torsionalvibrationmodelsofDMFonundampedmulti.freedom
toanddrivingconditionarebuiltbasedtheprinciplesofvehiclepowertheelastictrainequivalenttorsionalmodel.Accordingmechanicaldynamicsand
characteristicofDMF,thedesignmodelofDMFisbuilt,thatis,thefirstordermodelandthesecondordermodel.
Secondly,therelationshipbetweenrotaryinertiacoefficient,torsionalstiffness,transmissiongearboxand
thetorsionalvibrationfrequencyisanalyzedonthebasisofandthedesignmodel.Furthermore,a
anddesignmethodofrotaryinertiathematchingmethodofcoefficientfirstleveltorsionalstiffnessDMFandtransmission
thefirstleveltorsional
ongearboxareproposed.Afterwards,therelationshipbetweenstiffnessandthesecondleveltorsionalstiffnessiSderivedout
springsSOthebasisoftheinstallationformofthe
torsionalstiffnessisthatthedesignmethodofthesecondlevelestablished.Moreover,theoptimizationprincipleandmethodofthetwolevelstorsionalstiffnessunderdrivingconditionisstudied.Inthelate'r,theelasticcharacteristicsofthespringisanalyzedbythediscretemethod,andthenthecalculationformulafortheelasticcharacteristiesiS
conditionsofthe
Thirdly,the
derivedout,andalsothesuitableformulaiSdesigndiscussed.modelanddesignmethodofDMFareverifiedbytorsional