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1、西南交通大學碩士研究生學位論文第1I頁AbstractWiththeacceleratingdevelopmentofChinesehi曲-speedrailway,thelong-spancontinuousrigidflamebridgeisverywidelyusedbyitsconvenientconstruction，strongspanningabilityandfavorablesmooth-goingoftheline．Alongwiththeincreasingofthespeedo
2、ftrain，itraisesahigllstandardforthesmooth-goingoftheline，while，thedeformationofthebridgecausedbycreep—shrinkageandtemperatureeffect，maydeterioratethecomfortableandrunningsafetyinhi曲-speedrailway．Therefore，itisimportantandmeaningfultomakesomecorrespondin
3、gresearch．Thethesistakesa88m+168m+88mcontinuousrigidframebridgeasanexample．Basedonvehicle-track-bridgecouplingvibrationtheory,takingtheeffectofcreep-shrinkageandtemperatureintoaccount，thevehicle—track-bridgecouplingvibrationisanalyzedinthisarticlewithBD
4、APV2．0(bridgedynamicanalysisprogram)．Themainconclusionsareasfollows：(1)Consideringtheinfluenceofcreep—shrinkageortemperatureeffect，thereislittlechangeinthedynamicdisplacementandaccelerationofbridge，therateofwheelloadreduction．verticalaccelerationandSper
5、lingvalueincreaseindifferentdegreeS．Theresultshowthatthesafetyindexandthevehicleverticaldynamicresponseincreasedastheincrementofdeformation．(2)Whenthemostdisadvantageousconditionofcreep-shrinkageandtemperatureeffectsaretakenintoaccount．themaximumrateofw
6、heelloadreductionincreaseby14．3％whilethemaximumgrowthoftheverticalaccelerationofvehicleiSl0．7％．Theresultshowthatthecreep-shrinkageandtemperatureeffectmayhaveadverseeffectsintheanalysisofvehicle·track—bridgecoupledsystem．(3)nledeckdeformationcausedbycree
7、pandtemperaturechangesbelongstoverticallong—waveirregularity,affectsgreatlyinvehicleverticalcomfortwhenthetrainistravelingatahi曲speedwhilethelateralaccelerationandlateralSperlingvaluechangealittleinthiscondition．Theresearchresultsaresignificanttothetheo
8、reticalresearchandpracticalapplicationsforlong—spancontinuousrigidframebridge．Keywords：vehicle—track—bridgecoupledvibration，creep·shrinkage，temperatureeffect，continuousrigidflamebridge西南交通大學碩士研究生學位論文第1Il頁目錄第1章緒論??????????????????
