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ID:36438267
大小:5.91 MB
页数:72页
时间:2019-05-10
《城市轨道交通高架车站轨道结构振动特性研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
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
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