The Finite Element Analysis On The Coupling Vibration Of Vehicle/Bridge

Currently,our country is in a stage that the economy is developing at very high speed. As the main artery of whole national economy,railway takes on two important tasks:freight and passenger transportation. High speed-railway is doubtless to bring new vital force for railway transportation. But with the speed and the load increasing,the motivity between wheel and rail increases rapidly which can bring the kind of damage to vehicle and line and more seriously can lead digression. Therefore,proceeding to the vibration of vehicle and line system precision of emulation calculation is very urgent. Vehicle system vibration is an old problem in the world railway system. Because the complexity and the deficiency of the research tools and methods,up to now this question still remain unsolved. With the development of the computer and calculating dynamics,in recent years many researchers from different countries begin to research the coupling between train and line. The research on the coupling between vehicle and bridge with the finite element method becomes one of the very important constitutional parts.This paper complies analysis system procedure on the coupling vibration of vehicle-bridge based on reasonable method and uses this procedure to proceed dynamical response analysis to vehicle,bridge,vehicle-bridge on coupling vibration. Result shows:the vibration of vehicle is mainly relevant to velocity and uneven path. The higher the velocity is,the more uneven the path is,the more violent the vibration of vehicle is;comparing dynamical response of middle bridge stride on vehicle passing bridge and on equivalent moving loads,the displacement is same but the velocity and the acceleration are different;the result of velocity and acceleration of vehicle is big over the ground path than over the same path of bridge.This paper shows that analysis system procedure on the coupling vibration of vehicle-bridge can alone research vehicle vibration,bridge vibration and can still research vehicle-bridge on coupling vibration. Moreover,from the external data document to calculation,then to the result output can proceed together. The interface of procedure is amity,operation is simple and the function is strong. This text makes use of the the finite element method to solve coupling vibration of vehicle-bridge. From the flexibility commence to establish 3D model,it overcomes the limitation of traditional multi-rigid body on modeling and caculating. Thereby this paper studies some problems that are difficult to traditional research method.