铁道车辆空气弹簧刚度分析

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1、国内图书分类号：U270．33密级：公开国际图书分类号：629西南交通大学研究生学位论文年级三雯委2∑级姓名医盆申请学位级别亟±专业奎堑工程．指导老师奎董数援二零一一年四月一日西南交通大学硕士研究生学位论文第1I页AbstractAlongwith0111"country'shighspeedrailwayconstructionandthepromotionofthepassengertrain’Sspeed，undertheguaranteeofthesecurity'spremisepursui

2、nglongdistanceandshorttime'sconcepthasstruckrootintheheartsofthepeople．TherailroadpassengernolongersatisfymerelyinthejourneytransportationvehiclewhichridesCansafelyandpunctuallyarriveatthedestination,butistheunionofthespeed，ridescomfortableness，andthese

3、curity．High-speedrailroadletpassengerwhotakethetrainwhileenjoysthehighspeedrailroadtobringconvenientandefficiency,highlyaffirmingthevehicleswhichbetakentojourneycallbringcomfortablenessandstability．Asisknowntoa11，11igh·speedtrainsandrailsisbelongtowheel

4、／railcontact,anditsspeedisaverageabove200km／h,insatisfyingthestructuralstrengthunderthecondition,whetheritsdynamicsfactorcallsatisfythemovementquality'srequestunderthehighspeedtravelbecomethedeterminingfactor．thetrainwhichmove、析廿1llighspeedwillunavoidab

5、lyreceivefromtheTrackirregularityandtheexcitationwhichthecurvebringto，thusproducingverticalandlateralvibration,whichhasthetremendousinfluencetovehicles’safetyinoperation,thestabilityandthecomfortable．howtoalleviatethiskindofexcitation,becomesthekeyofimp

6、rovingthevehiclesmovementquality．Asvehicle'sshockattenuationdevice，theair-springcomparesthesteel-springhasobvioussuperiority,mainlydisplaysinthestiffnessonnonlinearcharacteristics．Ordinarysteel-spring'sstiffnesscannotbeadjustedinthebeginningofdesign,jus

7、taccordingtotheoperationsectionsdosomeimprovement,whichresultingintheobdousdifferenceoftheridingqualitybetweenthedifferentloadvehicles．Whileair-springCanaccordingtothedifferenceontheloadadjustthestiffness，whichassuringthesteadyofthenaturalfrequencyofvib

8、ration,additionallywiththeeffectofthelevelingvalvemakingthevehicle’Sridingqualitymoresteady．ThefiniteelementSOflV矿are'Ssimulationhavethemeritforreducingtheexperimentcostalltheexperimentcycle，whichcallalsoprovideamorehighlyeffecti