The Analysis On Dynamic Characteristics Of Longitudinal Connected Ballastless Track On The Curved Bridge

Abstract:This paper chooses the longitudinal connected ballastless track on the curved bridge as the research object. It analysizes the vibration response of the train, track and bridge when the high-speed train passing, using the multi-body dynamic analysis software SIMPACK and finite element analysis software ANSYS. The main research contents are as follows:(1) Establish the coupling dynamic model on the curved section with the multi-body dynamic analysis software SIMPACK. It simulates the safety and comfort index of the train moving and wheel-rail force and acceleration time-history in the conditions of different speed, superelevation and radius.(2) Establish the analysis model of longitudinal connected ballastless track laid on curved bridge by using the finite element software ANSYS. By SIMPACK analysis results as input, it calculates the dynamic time-history response of track and bridge.(3) Obtain the effects of the vibration response of rail, track plate, base plate and bridge are reflected by the superelevation, radius and the train speed.Research shows that the nearer real superelevation approaches balance superelevation, the better will be the vibration characteristics of each part of the track. The safety and comfort of the high-speed train and the vibration properties decreases with increasing radius (the decreasing trend is more mild with radius increasing) and increases as the speed increases (the magnitude of increase is greater with the speed increasing). But when the curve radius is large to a certain extent, only by increasing radius to reduce the vibration parameters is not desirable.