连续多桥墩沉降与高速列车动态特性间的定量关系研究

doi:10.3901/JME.2021.10.065

机械工程学报 ›› 2021, Vol. 57 ›› Issue (10): 65-76.doi: 10.3901/JME.2021.10.065

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连续多桥墩沉降与高速列车动态特性间的定量关系研究

陈兆玮^1,2, 翟婉明²

1. 重庆交通大学机电与车辆工程学院重庆 400074;
2. 西南交通大学牵引动力国家重点实验室成都 610036

收稿日期:2020-06-09 修回日期:2021-03-10 出版日期:2021-07-23 发布日期:2021-07-23
通讯作者: 陈兆玮(通信作者),男,1988年出生,博士,副教授,硕士研究生导师。主要研究方向为列车-轨道-桥梁系统动力学、环境振动及控制。E-mail:chenzhaowei_cq@163.com
基金资助:
国家自然科学基金（52008067）、重庆市基础研究与前沿探索（cstc2018jcyjAX0271）和牵引动力国家重点实验室开放课题（TPL1901）资助项目。

Relationship between Multi-pier Settlement and Dynamic Performance of High-speed Train

CHEN Zhaowei^1,2, ZHAI Wanming²

1. School of Mechanotronics & Vehicle Engineering, Chongqing Jiaotong Univeristy, Chongqing 400074;
2. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610036

Received:2020-06-09 Revised:2021-03-10 Online:2021-07-23 Published:2021-07-23

摘要/Abstract

摘要： 高速铁路桥梁施工及运营过程中难免出现桥墩沉降，可能会导致列车通过时的异常振动。针对高速铁路连续桥墩沉降这一实际问题，探讨多桥墩沉降条件下轨道结构变形过程，并推导连续多桥墩沉降下钢轨变形方程。基于车辆-轨道耦合动力学，建立考虑多桥墩沉降的高速列车-轨道-桥梁动力学模型，并研究连续多桥墩沉降下高速列车的动态特性，探明列车动态特性变化情况与多桥墩沉降量之间的定量数学关系式。研究表明，连续多桥墩沉降会增大列车的振动；连续多桥墩沉降引起的钢轨附加变形对里程的二阶导数与车辆动态特性之间存在线性关系，该关系可用于简化传统车轨桥研究中的相关计算过程；基于列车运行安全平稳性指标，桥墩不均匀沉降应控制在26.3 mm以内，表明我国高速铁路中5 mm的桥墩沉降标准具有较高的安全余量。

关键词: 高速列车, 桥墩沉降, 动态特性, 钢轨变形, 映射关系

Abstract: Pier settlement is hard to be avoided in the construction and operation of high-speed railways, which may lead to abnormal vibrations of trains. Aiming at pier settlement in Chinese high-speed railway, the deformation of track caused by multi-pier settlement is discussed, and the deformation expression of track is deduced. Based on the train-track coupled dynamics, a train-track-bridge dynamic interaction model considering multi-pier settlement is established; the influence of multi-pier settlement on the dynamic responses of running trains is investigated, and the mapping expressions between train vibrations and multi-pier settlement are deduced. Results show that train vibrations are affected by multi-pier settlement. Linear relationship is determined between the train vibration and the second derivative of the rail deformation, which can be employed to simplify the calculations in the train-track research. Based on the running performances of trains, the suggested pier settlement safety threshold is 26.3 mm, which indicates that the limit value of pier settlement(5 mm) in current code has a margin of safety.

Key words: high-speed train, pier settlement, dynamic performance, rail deformation, mapping relationship

中图分类号:

陈兆玮, 翟婉明. 连续多桥墩沉降与高速列车动态特性间的定量关系研究[J]. 机械工程学报, 2021, 57(10): 65-76.

CHEN Zhaowei, ZHAI Wanming. Relationship between Multi-pier Settlement and Dynamic Performance of High-speed Train[J]. Journal of Mechanical Engineering, 2021, 57(10): 65-76.

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连续多桥墩沉降与高速列车动态特性间的定量关系研究

Relationship between Multi-pier Settlement and Dynamic Performance of High-speed Train

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