鋼絲繩式無級(jí)變速器(WR-CVT)鋼絲繩力學(xué)特性分析.pdf

1、論文題目：鋼絲繩式無級(jí)變速器(WRCVT)鋼絲繩力學(xué)特性分析專業(yè)：機(jī)械設(shè)計(jì)及理論碩士生：路正雄（簽名）指導(dǎo)教師：郭衛(wèi)（簽名）摘要本文依托國家自然科學(xué)基金項(xiàng)目“新型車用金屬帶式無級(jí)變速器螺旋纏繞鋼絲疲勞與磨損失效機(jī)理研究”（批準(zhǔn)號(hào)：51505373）和陜西省教育廳科研計(jì)劃項(xiàng)目“螺旋纏繞式無級(jí)變速器鋼絲彎曲承載特性及表面損傷行為研究”（項(xiàng)目編號(hào)：15JK1490），從帶傳動(dòng)基本理論入手，運(yùn)用坐標(biāo)變換理論、彈性力學(xué)以及有限元法，對(duì)鋼絲繩式無級(jí)

2、變速器(WireRopeCVT，簡稱WRCVT)中的關(guān)鍵傳動(dòng)元件——鋼絲繩進(jìn)行承載特性分析，為轎車用WRCVT的研究與開發(fā)提供理論基礎(chǔ)。主要內(nèi)容如下：在對(duì)鋼絲繩式無級(jí)變速器的基本結(jié)構(gòu)和傳動(dòng)機(jī)理進(jìn)行分析的基礎(chǔ)上，確定了無級(jí)變速器的主要結(jié)構(gòu)參數(shù)，建立了鋼絲繩的結(jié)構(gòu)模型；在分析WRCVT所用鋼絲繩的成型過程的基礎(chǔ)上，建立了平直和彎曲鋼絲繩的數(shù)學(xué)模型和幾何模型；基于Costello的鋼絲繩彈性理論，建立了平直和彎曲鋼絲繩的力學(xué)模型；通過分析鋼絲

3、繩與金屬塊的接觸關(guān)系，推導(dǎo)出了繩與圓弧槽的接觸正壓力表達(dá)式，并對(duì)接觸段和非接觸段的鋼絲繩進(jìn)行了力學(xué)分析；運(yùn)用ABAQUS軟件建立了鋼絲繩的有限元分析模型，對(duì)平直狀態(tài)鋼絲繩股內(nèi)鋼絲的應(yīng)力及變形分布進(jìn)行了仿真，對(duì)比分析了鋼絲圓周方向、繩截面半徑方向、繩軸線方向的應(yīng)力變化規(guī)律，揭示了無級(jí)變速器所用鋼絲繩的承載特性。關(guān)鍵詞：鋼絲繩式無級(jí)變速器；67IWS鋼絲繩；數(shù)學(xué)模型；力學(xué)建模；仿真分析研究類型：應(yīng)用研究Subject：AnalysisonM

4、echanicalPerfmancesofWireRopeinWireRopeCVTSpecialty：MechanicalDesignTheyName：LuZhengxiongGuoWei（Signature）Instruct：（Signature）ABSTRACTTheresearchissupptedbyNationalNaturalScienceFoundationItem(GrantNo:51505373)Scientific

5、ResearchProgramFundedbyShaanxiProvincialEducationDepartment(ProgramNo.15JK1490).Applyingwiththebasictheyofbeltdrivecodinatetransfmationtheyelasticmechanicsfiniteelementmethodtheanalysisofbearingcapacityofthesteelwirerope

6、asthekeytransmissioncomponentsofthewireropetypecontinuouslyvariabletransmissionprovidestheeticalbasisftheresearchdevelopmentofWRCVT.Themainresearchisasfollows:Thispaperstudiedthebasicstructuretransmissionmechanismofthewi

7、reropeCVTthemainstructuralparametersofCVTweredeterminedtoestablishastructuralmodelofsteelwireropebasedontheanalysisofthefmingprocessofsteelwireropeusedonWRCVTestablishedthemathematicalmodelthegeometricmodelofstraightcurv

8、edsteelwireropesteelwireropebasedonCostelloelastictheyestablishedthemechanicalmodelofstraightbendingthewireropethroughtheanalysisofthecontactbetweenthewireropethemetalblockdeducestheropethecirculargrooveofcontactpressure

9、contactwireropeexpressionbuttsectionnoncontactsectionofthemechanicalanalysisofthebuildingfiniteelementanalysisofwireropemodelusingABAQUSsoftwarethestressdefmationdistributionofsteelwireflatwireropearesimulatedcomparedana

10、lyzedthecircumferentialdirectioncutwirerope.Thestressvariationlawofthedirectionofthesurfaceradiusthedirectionoftheropeisrevealedtheloadacteristicsofthewireropeusedinthecontinuouslyvariabletransmissionarerevealed.Keywds:W