铁路轮轨冲击振动模拟与试验

Simulation and experiment of railway wheel/rail impact vibrations

对铁路工程领域普遍存在的轮轨冲击振动现象进行了理论与试验研究。将车辆模拟为移动的多刚体振动系统，将轨道描述成离散点支承连续梁结构，应用快速数值积分方法编制了ＶＩＣＴ模拟软件，实现了轮轨冲击振动的快速数值模拟。以轨道接头处的冲击为例，进行了铁路轮轨冲击振动现场试验。试验结果与理论模拟结果取得了良好的一致性。

This paper deals with the theoretical simulation and experimental measurement on the wheel/rail impact vibrations that widely occur in railway engineering. A vehicle/track interaction model is built, according to the theory of vehicle track coupling dynamics. The vehicle is modeled as a multibody dynamic system and the track is described as a discretely supported beam structure. A computer program, VICT, is designed to simulate numerical responses of the wheel/rail systems due to impact excitations. A full scale field experiment is performed on the wheel/rail impact vibrations at a rail joint. Good correlation is obtained between the experiment data and the simulation results.