地铁线路隧道沉降对车辆-轨道系统力学特性的影响*

doi:10.16265/j.cnki.issn1003-3033.2019.S1.020

中国安全科学学报 ›› 2019, Vol. 29 ›› Issue (S1): 107-113.doi: 10.16265/j.cnki.issn1003-3033.2019.S1.020

地铁线路隧道沉降对车辆-轨道系统力学特性的影响^*

赵闻强, 高亮教授, 肖宏教授, 钟阳龙, 侯博文讲师

北京交通大学道路与铁道工程系,北京 100044

收稿日期:2019-03-15 修回日期:2019-05-24 出版日期:2019-06-30 发布日期:2020-10-28
作者简介:赵闻强 (1993—),男,浙江义乌人,博士研究生,研究方向为无砟轨道及轨道动力学。E-mail:15115272@bjtu.edu.cn。
高亮(1968—),男,山东滕州人,博士,教授,主要从事轨道工程与工务管理方面的研究。E-mail:lgao@bjtu.edu.cn。
基金资助:
国家重点研发计划课题(2016YFB1200402,2017YFB1201104);中国铁路总公司科技研究开发计划项目(2017G002-A,2017G010-A)。

Influence of tunnel settlement on mechanical properties of metro vehicle-track system

ZHAO Wenqiang, GAO Liang, XIAO Hong, ZHONG Yanglong, HOU Bowen

Department of highway and railway engineering, Beijing Jiaotong University, Beijing 100044, China

Received:2019-03-15 Revised:2019-05-24 Online:2019-06-30 Published:2020-10-28

摘要/Abstract

摘要： 为评估地铁线路隧道沉降对车辆-轨道系统力学特性的影响,基于有限元(FE)方法和车辆-轨道耦合动力学理论,建立地铁车辆-轨道-下部基础动力学耦合模型,并以北京某地铁线路为例,分析沉降作用下系统的静、动力学特性。研究结果表明:上部不平顺幅值与沉降幅值基本呈1∶1传递;在沉降区边界道床有拉裂的风险;车辆进入沉降区域后,轮轨垂向力因下凹曲线变化率影响出现冲击-减载-平稳-冲击现象;随着沉降量的增加,车辆动力学指标基本呈线性增长,沉降幅值从5 mm增长至20 mm,车体加速度峰值由0.167 m/s²增加至0.259 m/s²,增加了55.08%。

关键词: 地铁, 基础变形, 沉降, 变形传递, 车辆-轨道耦合动力学

Abstract: In order to evaluate the influence of tunnel settlement on the mechanical properties of vehicle-track system, a vehicle-track-foundation dynamic coupling model was established based on the finite element (FE) method and vehicle-track coupling dynamic theory. A metro line in Beijing was taken as an example.The static and dynamic characteristics of the whole system under settlements were analyzed.The calculation results show that the upper irregularity amplitude is basically same with the settlement amplitude. There is a risk of tensile fracture for track bed at the border of settlement area.When the vehicle got into the settlement area, the vertical wheel-rail force appeared an impact-load reduction-steady-impact phenomenon due to the 1st derivative characteristic of settlement curve.With the increase of settlement, the vehicle dynamic index increases linearly.Whenthe settlement amplitude increases from 5 mm to 20 mm, the peak value of car body acceleration will increase from 0.167 m/s² to 0.259 m/s², which increases 50%.

Key words: metro, foundation deformation, settlement, deformation transfer, vehicle-track coupling dynamics

中图分类号:

X951

赵闻强, 高亮, 肖宏, 钟阳龙, 侯博文. 地铁线路隧道沉降对车辆-轨道系统力学特性的影响^*[J]. 中国安全科学学报, 2019, 29(S1): 107-113.

ZHAO Wenqiang, GAO Liang, XIAO Hong, ZHONG Yanglong, HOU Bowen. Influence of tunnel settlement on mechanical properties of metro vehicle-track system[J]. China Safety Science Journal, 2019, 29(S1): 107-113.

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地铁线路隧道沉降对车辆-轨道系统力学特性的影响^*

Influence of tunnel settlement on mechanical properties of metro vehicle-track system

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