博格板式無砟軌道路橋過渡段豎向動力響應(yīng)分析.pdf

1、中南大學(xué)碩士學(xué)位論文博格板式無砟軌道路橋過渡段豎向動力響應(yīng)分析姓名：王夢申請學(xué)位級別：碩士專業(yè)：道路與鐵道工程指導(dǎo)教師：唐進鋒20071101ABSTRACTWiththerapiddevelopmentofmodemhigh—speedrailwayandpassengerdedicatedlines，ballastlesstrackisbeingwidelyused，theformpavedonthebridgeismoreuniv

2、ersalSincetheengineeringpropertiesofembankmentsandbridgesareSOdifferentthatseriousunevennessispronetooccurinthelinkingofembankmentsandbridgesBesides，thisphenomenonisworsenedwiththeincreaseofthetrainrunningspeedandtheaxia

3、lload，quickensthedistortionanddestructionofthetrack，affectsthecomfortandstability，evenendangersthesafetyofthetrainBasedontheresearchstatusofvehicletrackbridgeandthetransitionalsectionoftheembankmentsandbridgesathomeandab

4、road，onthebasisofcomprehensiveanalysis，inthispaper，theBOglslabballastlesstrackisusedasthecarrierThetrackbetweeneveryadjacencytwofasteneristreatedasanelementinwhichtherailissimulatedascontinuity—point—suportingEulerbeam，t

5、hecushionoftherailissimulatedaslinespringanddampers，thetrackslabissimulatedaselasticplates，themortarissimulatedaslinedistributeddiaphragmflexureanddampersthebridgeiSsimulatedasEulerbeamThevehicleiSsimulatedas6freedommult

6、i—bodymodelTheequationsdescribingtheverticalvibrationofthesystemareformulatedonthebasisofminimumpotentialtheoryand“sitintherightseat’principle，andsimulatingprogramisconstructedaccordinglywithFORTRANOnthebasisofthevertica

7、lvibrationmodel，thesimplysupportedbeamwith32mspantotheqin—shenpassengerdedicatedlineissetasanexample，theverticalfreevibrationofthemodeliSanalyzed，theverticalfreevibrationfrequencyoftheformersixstepsandsomevibrationmodear

8、eputforwardAndthecalculatingresultsareprovedtobecorrectandreliableAnanalysisthatcontraststhedynamicbehaviorofthetrainonthetwocommonspanusedinthepassengerdedicatedlinesiSbeendoneTheef詫ctofthetrainformationthespanswithcont