垫板刚度对地铁线路轨道垂向特性的影响研究

黄乾兴　唐可

摘 要：本文基于車辆-轨道耦合动力学理论，运用MATLAB软件建立了地铁车辆-轨道耦合模型，分析了轨下垫板刚度对轨道结构动力学性能的影响。结果显示：低刚度的轨下垫板有利于降低钢轨和轨道板的振动，并能降低轨道板和道床的垂向位移，因此及时检查并更换老化的橡胶垫板可有效提高轨道的平稳性。

关键词：地铁线路 轨下垫板 动力学性能

Study on the Influence of the Stiffness of the Track Pad on the Vertical Characteristic of the Subway Line

Huang Qianxing，Tang Ke

Abstract：Based on the dynamics theory of the vehicle-track coupling system， this MATLAB software used to establish a metro vehicle-track coupling model， and analyzes the influence of the stiffness of the under- track pad on the dynamic performance of the track structure. The results show that the low-rigidity under- track pad is beneficial to reduce the vibration of the rail and the track slab， and can reduce the vertical displacement of the track slab and the track bed， so timely inspection and replacement of the aging rubber pad can effectively improve the stability of the track.

Key words：subway line， under-track pad， kinetic performance