城市轨道交通高架车站轨道结构振动特性研究

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1、北京交通大学硕士学位论文城市轨道交通高架车站-轨道结构振动特性研究姓名：李冬冬申请学位级别：硕士专业：道路与铁道工程指导教师：彭华20080601△旦苎!丛￡!ABSTRACTABSTRACT：Withfastdevelopmentofurbanizationandincreasingtrafficpressureandproblems，itisnecessarytodevelopalargecapacityurbanpublictraffic．Urbanrailtransithasmademan

2、yprogressesandimprovementsinrecentlyyears，whichisgoodatlargecapacity’highspeed，nicesafety,precisetime，savingenergyandSOon．Elevatedrailtransitisobtainingmoreandmoreattentionandapplication，asitisaneconomic，usefulandhighefficiencyhigllspeedtransportation

3、．Ithasthreeoutstandingpoints，whicharesmalltechnologydifficultytodesignandestablish，lowexpenses，andshorttimetofinish．Theelevatedstationgeneratedwiththedevelopmentofsuchnewsystem．Regardingelevatedstationandtrackstructureasasystem，onthebackgroundofspacee

4、levatedstation，thisreportmakeanalysesonthevibrationperformancewhenthetotallysystemisunderdynamicaleffect，especiallypaymoreattentionontotheeffectonvibrationperformancewhenparameteroneachpartdiffers．Afterabriefanalysisonrelevantstudiesofpresenturbanelev

5、ationrailtransitvibrationperformance，thispapersetsupathree-dimensionaldynamicalanalysismodel，andconsidersthecomponentsandconnectionsofeachpartofsystem．Onthebasisofaboveanalysis，thispapermakesextendedmodalanalysistothemodel，andachievesthefirsttenstepsn

6、aturalfrequencyandrelevantmodeshapeofthesystem．Onthebasisofabovemodelanalysis，thispaperseparatelyanalysesthevibrationperformanceundertheharmonicvibrationloadsandtrainmovingloads．Duringtheanalysisofharmonicvibration，thispaperconsiderstheeffectonsystemv

7、ibrationwhensomeparametersdiffersuchasthestiffnessofrailpad，themassofelasticsupportblock．Ⅵmileattheanalysisoftransientdynamics，thispapermainlyreferstothevelocityoftraininbothsingleandbidirectionaldirection，thestiffnessofrailpad，andSOon．Andthen，thispap

8、ergetssomegoodconclusionsandsuggestions．Lastly,thispapermakesafinalconclusiontoallaboveanalysis．Andsimultaneously,thispapergivessomeproposalsonshortagesandnewquestionsneedtoberesearchedfurthermoreinfuture．KEYWoRDS：Elevatedstation；trackstructur