金屬帶式無級變速傳動動態(tài)特性的理論及實驗研究.pdf

1、重慶大學博士學位論文金屬帶式無級變速傳動動態(tài)特性的理論及實驗研究姓名：楊為申請學位級別：博士專業(yè)：機械設(shè)計及理論指導教師：秦大同2001.7.11墾壅查堂堡主堂堡笙奎壘!!!墨壘蘭三ABSTRACTThemetalpushingVbelttypecontinuouslyvariabletransmission(CVT)is811idealtransmissionsystem，whichofferssignificantadvantage

2、sforperformanceandfueleconomyforautomobileStudyonthetransmissionmechanismanddynamiccharacteristicofCVThasimportanttheoreticalmeaningandengineeringpracticalvalueThecreativeresultsondynamiccharacteristicofCVTandtransmissio

3、nmechanismbasedonsystemtheoreticalanalysisandexperimentresearchareacquiredundertheproject(59835160)financedbyNationalScienceFoundationThemechanicsmodelsofmetalbandstransmissionconcerningclampforceofpulleyaxialforcethrust

4、andtensionisbuiltbasedonCoulombfrictiontheoryTheforcesactingonthemetalblocksandringsofCVTarerespectivelycalculatedunderdifferentconditionsandfactorsincludingcomponentparameters，speedratioinfiuencedonloaddistributingarean

5、alyzedThetransmissionmechanismoftheCVTdrivingbytensionsandthrustforcetensionisrevealed；theimportantconclusionsamongaxialforceofpulley，torque，rotatespeedaredrawnForthefirsttimethetheoreticaIsystemonthedynamiccharacteristi

6、csofmetalbeltcontinuouslyvariabletransmissioniSputforwardandestablishedThetransmissionmodelcomposingofthedrivingaxis，drivingpulleydrivenaxis，drivenpulleymetalblocksandmetalringsisbuiltandthenodenoderoddiscretefiniteeleme

7、ntmodelisproposedn∞dynamiccharacteristicsofmetal—beltcontinuouslyvariabletransmissionaretheoreticallystudiedunderdifferentconditions，whichlaysatheoreticalfoundationfordynamicqualificationresearch，improvementofloadcapacit

8、ydynamicresponseanalysisandevaluatingthefatiguelifeofthetransmissionsystemForthefirsttime，theexperimentalmodalityanalysisonthekeycomponentcomposedofmetalringsandblocksisstudiedThemodalfrequencies，dampratiosandmodalshapes

9、ofsubsystemareobtained；problemsindecidingboundaryconditionoffiniteelementmodelareresolved，whichprovidesanimportantbasisfornoiseandvibrationreductionTheprincipleandmethodofambienttestiSstudiedF0rthefirsttimethemodalparame

10、tersoftheCVTarcidentifiedbytheaccelerationsignaloftheCVTpicked叩intransmissiontestbenchwhenthetransmissionsystamiSinoperationThedi衢cultproblemthatcannotbesolvedbycommonexperimentalmodalityanalysisisovercomeTheexperimentco