橡胶隔振垫减振型双块式无砟轨道减振性能分析

Research on Damping Performance of Bi-block Sleeper Ballastless Track with Rubber Pad.

某市域铁路高架桥地段采用双块式无砟轨道,并在道床板下设置橡胶隔振垫以满足减振要求。本文采用有限元方法建立轨道结构空间模型,通过改变道床板厚度、橡胶隔振垫刚度,对轨道结构及线下基础进行动力计算,对比分析轨道结构固有频率、振动位移幅值、振动加速度,为市域铁路建设中该类轨道结构的设计提供理论依据。

Bi-block sleeper ballastlesstrack is used on bridge in one suburban railway construction. In order to meet the standard of vibration attenuation, rubber pad is installed under the track slab. By the method of FEA, the dynamic performance of the track structure and the understructure is calculated in this paper.Altering the thickness of the track slab and the stiffness of rubber pad,natural frequency,amplitude and acceleration of vibration is comparatively analyzed, providing suggestion for designing of similar track structure in suburban railway systems.