Abstract
AbstractThere are a large number of bridges, grade crossings and rigid culverts involved in railway transportation, which result in plenty of track transitions. When the high speed train moves over the region of vertical stiffness with abrupt change, additional wheel-rail contact force will be generated obviously. In this chapter, the dynamic analysis model of the train-ballast track-subgrade coupling system is developed based on the model and the algorithm of the vehicle element and track element. To the problem of the frequent occurrence of track faults caused by train bumping at roadbed-bridge joints of high-speed railways, parameter analyses are performed to investigate the influences of the train speeds, the track foundation stiffness, and the transition irregularity on the dynamic responses of the vehicle and the track structure in track transitions.
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