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1、西南交通大學(xué)碩士研究生學(xué)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(xué)碩士研究生學(xué)位論文第1Il頁目錄第1章緒論??????????????????