垫板阻尼对地铁线路轨道垂向特性的影响研究  

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

作　　者：黄乾兴 Huang Qianxing(Liuzhou Railway Vocational Technical College,Liuzhou Guangxi,545616)

机构地区：[1]柳州铁道职业技术学院,广西柳州545616

出　　处：《电子测试》2021年第20期42-44,共3页Electronic Test

基　　金：柳州铁道职业技术学院校级项目资助:地铁线路轨下垫板的研究与优化设计(2018-KJA06)。

摘　　要：本文基于车辆-轨道耦合动力学理论,运用MATLAB软件建立了地铁车辆-轨道垂向耦合模型,分析了轨下垫板阻尼对轨道结构动力学性能的影响。结果显示:当轨下垫板阻尼从30kN·s/m逐渐增大到150kN·s/m时,轮轨垂向力、轨道板和道床的垂向位移均逐渐减小;轨道板和道床的垂向加速度均增大。因此低阻尼的垫板有利于降低轨道板和道床的振动,同时又会增大轮轨垂向力、轨道板和道床的垂向位移,因此选用垫板时其阻尼要在合理范围内才能有效提高轨道的平稳性。Based on the theory of vehicle-track coupling dynamics,the MATLAB software used to establish a metro vehicle-track vertical coupling model,and analyzes the influence of the underrail pad damping on the dynamic performance of the track structure.The results show that when the damping of the pad under the rail gradually increases from 30kN·s/m to 150kN·s/m,the vertical force of the wheel and rail,the vertical displacement of the track slab and the track bed are gradually reduced;the track slab and the track bed are gradually reduced.The vertical acceleration increases.Therefore,the low-damping pad is beneficial to reduce the vibration of the track slab and the track bed,and at the same time,it will increase the vertical force of the wheel and rail,and the vertical displacement of the track slab and the track bed.Therefore,when the pad is selected,its damping must be within a reasonable range to be effective.Improve the stability of the track.

关 键 词：地铁线路 轨下垫板 动力学性能 

分 类 号：U231[交通运输工程—道路与铁道工程]