横风作用对重载铁路桥上列车脱轨全过程的影响  

Effects of Crosswind on Freight Train Derailment Process on Heavy Haul Railway Bridge

作　　者：龚凯[1,2] 刘林芽[2] 向俊[3] 余翠英 刘全民 杨海明 GONG Kai;LIU Linya;XIANG Jun;YU Cuiying;LIU Quanmin;YANG Haiming(State Key Laboratiory of Performance Monitoring and Protecting of Rail Transit Infrastructure,East China Jiaotong University,Nanchang 330013,China;Engineering Research Center of Railway Environmental Vibration and Noise,Ministry of Education,East China Jiaotong University,Nanchang 330013,China;School of Civil Engineering,Central South University,Changsha 410075,China;School of Science,East China Jiaotong University,Nanchang 330013,China)

机构地区：[1]华东交通大学轨道交通基础设施性能监测与保障国家重点实验室,江西南昌330013 [2]华东交通大学铁路环境振动与噪声教育部工程研究中心,江西南昌330013 [3]中南大学土木工程学院,湖南长沙410075 [4]华东交通大学理学院,江西南昌330013

出　　处：《铁道学报》2022年第8期125-134,共10页Journal of the China Railway Society

基　　金：国家自然科学基金(52068028,51578238,52068030,U1261113);江西省重点研发计划(20181BBE50013);华东交通大学轨道交通基础设施性能监测与保障国家重点实验室自主课题(HJGZ2021212);江西省教育厅科学技术研究项目(GJJ210621);江西省自然科学基金(20212BAB204015,20202BAB204027)。

摘　　要：基于货物列车-轨道-桥梁系统(FTTB系统)空间振动计算模型,将横风作用转化为构架蛇行波,建立横风作用下FTTB系统空间振动计算模型;根据列车脱轨能量随机分析方法,提出横风作用下重载铁路桥上列车脱轨全过程计算方法及列车脱轨预警原理;实现不同风速、车速下桥上列车脱轨全过程计算,分析横风对列车脱轨全过程的影响。结果表明:车速60~80 km/h、风速20.7~28.4 m/s时,车轮悬浮量均达到25 mm,列车脱轨;随着风速及车速的增大,脱轨系数、轮重减载率、转向架与钢轨横向相对位移、梁跨跨中及墩顶横向位移均增大明显;考虑安全系数1.25,得到不同车速、风速下转向架与钢轨横向相对位移预警阈值。上述结论可为研发横风作用下桥上列车脱轨预警装置提供理论依据和基础数据。The spatial vibration calculation model of freight train-track-bridge(FTTB)system under the crosswind action was established by adopting the crosswind action as the hunting wave of bogie frame.Based on the random energy analysis theory of train derailment,the calculation method of train derailment process on heavy haul railway bridge under the crosswind action and the early warning principle of train derailment were proposed.The method was used to calculate the whole process of train derailment on the bridge under different wind speeds and vehicle speeds,and to analyze the influence of crosswind on the derailment process of freight train.The results show that at the vehicle speed of 60~80 km/h and the wind speed of 20.7~28.4 m/s,the wheel lift value reaches 25 mm,causing the train derailment.As the wind speed and vehicle speed increase,the derailment coefficient,wheel load reduction rate,the lateral relative displacement between bogie and rail,the lateral displacement of the middle of beam span and the top of the pier all increase significantly.With the safety factor of 1.25,the early warning threshold values of relative displacement between the bogie and rail at different vehicle speeds and wind speeds are obtained.The above results can provide theoretical foundation and basic data for the development of early warning devices for train derailment on heavy-haul railway bridge under crosswind.

关 键 词：铁道工程 重载铁路桥梁 横风作用 列车脱轨全过程 脱轨预警装置 

分 类 号：U213.2[交通运输工程—道路与铁道工程]