Dynamic Analysis of the Track on Roadbed-bridge Transition Section and Research on its Reasonable Length

摘要

By using discrete model to simulate track system, a model of the track on roadbed-bridge transition section was established, and the structure of the track on roadbed-bridge transition section was analyzed with the finite element analysis software ANSYS. The distribution of displacement, rotation angle and surface stress of roadbed near the transition section were discussed for different length of roadbed-bridge transition section under dynamic vibration. The influence of the different stiffness ratio and speed of train on the dynamic performance of system was studied. Some theoretical bases for determining the reasonable length of the roadbed-bridge transition section had been discovered.