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ID:32289479
大小:5.25 MB
页数:85页
时间:2019-02-02
《博格板式无砟轨道路桥过渡段竖向动力响应分析》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、ABSTRACTWiththerapiddevelopmentofmodemhigh—speedrailwayandpassengerdedicatedlines,ballastlesstrackisbeingwidelyused,theformpavedonthebridgeismoreuniversal.SincetheengineeringpropertiesofembankmentsandbridgesareSOdifferentthatseriousunevennessispronetooccurinthelinkingofembankmentsa
2、ndbridges.Besides,thisphenomenonisworsenedwiththeincreaseofthetrainrunningspeedandtheaxialload,quickensthedistortionanddestructionofthetrack,affectsthecomfortandstability,evenendangersthesafetyofthetrain.Basedontheresearchstatusofvehicle..track..bridgeandthetransitionalsectionofthe
3、embankmentsandbridgesathomeandabroad,onthebasisofcomprehensiveanalysis,inthispaper,theBOglslabballastlesstrackisusedasthecarrier.Thetrackbetweeneveryadjacencytwofasteneristreatedasanelement.inwhichtherailissimulatedascontinuity—point—suportingEulerbeam,thecushionoftherailissimulate
4、daslinespringanddampers,thetrackslabissimulatedaselasticplates,themortarissimulatedasline..distributed..diaphragm..flexureanddampers.thebridgeiSsimulatedasEulerbeam.ThevehicleiSsimulatedas6.freedommulti—bodymodel.Theequationsdescribingtheverticalvibrationofthesystemareformulatedont
5、hebasisofminimumpotentialtheoryand“sitintherightseat'’principle,andsimulatingprogramisconstructedaccordinglywithFORTRAN.Onthebasisoftheverticalvibrationmodel,thesimplysupportedbeamwith32mspantotheqin—shenpassengerdedicatedlineissetasanexample,theverticalfreevibrationofthemodeliSana
6、lyzed,theverticalfreevibrationfrequencyoftheformersixstepsandsomevibrationmodeareputforward.Andthecalculatingresultsareprovedtobecorrectandreliable.AnanalysisthatcontraststhedynamicbehaviorofthetrainonthetwocommonspanusedinthepassengerdedicatedlinesiSbeendone.Theef诧ctofthetrainform
7、ation.thespanswithcontinuousarrangedsimplysupportedbeamsandthetrainrunningspeedonthedynamicbehaviorofthevehicleisalsobeenstudied.1IInordertoanalyzeandevaluatethedynamicpropertiesofthetransitionalsectionbetweentheembankmentsandbridgesroundly,thedistortionofthetrackiSsimulatedasacosi
8、necurve.withtheverticalcou
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