Dynamic performance of heavy-haul combined train applying emergency braking on straight line  

作　　者：刘鹏飞 王开云 

机构地区：[1]School of Mechanical Engineering,Shijiazhuang Tiedao University,Shijiazhuang 050043,China [2]State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,China

出　　处：《Journal of Central South University》2017年第8期1898-1908,共11页中南大学学报（英文版）

基　　金：Projects(51605315,51478399)supported by the National Natural Science Foundation of China;Project(2013BAG20B00)supported by the National Key Technology R&D Program of China;Project(TPL1707)supported by the Open Project Program of the State Key Laboratory of Traction Power,China

摘　　要：A heavy-haul train-track coupled model is developed. Taking the emergency braking of the 2×104 t combined train as example, the train longitudinal impulse, the coupler dynamic behaviors and wheel-rail interactions of vehicles distributing in the different positions are analyzed. The results indicate that under the coupler compressing forces, the couplers of middle locomotives may tilt to the free swing limits, which induces the unidirectional tilt of their connected wagon couplers. Consequently, the coupler longitudinal forces produce the lateral components, and then affect the wheel-rail dynamic interaction. The performance of the middle locomotive and their neighboring freight wagons deteriorate significantly, becoming the most dangerous parts in the combined train. The wagons disconnecting with the locomotives can basically keep their couplers to stabilize in the centering positions, even though the maximum coupler longitudinal force acts on it. And its corresponding running safety also has little changes.A heavy-haul train-track coupled model is developed. Taking the emergency braking of the 2×104 t combined train as example, the train longitudinal impulse, the coupler dynamic behaviors and wheel-rail interactions of vehicles distributing in the different positions are analyzed. The results indicate that under the coupler compressing forces, the couplers of middle locomotives may tilt to the free swing limits, which induces the unidirectional tilt of their connected wagon couplers. Consequently, the coupler longitudinal forces produce the lateral components, and then affect the wheel-rail dynamic interaction. The performance of the middle locomotive and their neighboring freight wagons deteriorate significantly, becoming the most dangerous parts in the combined train. The wagons disconnecting with the locomotives can basically keep their couplers to stabilize in the centering positions, even though the maximum coupler longitudinal force acts on it. And its corresponding running safety also has little changes.

关 键 词：heavy-haul train longitudinal impulse vehicle–track coupled dynamics emergency braking 

分 类 号：U211.5[交通运输工程—道路与铁道工程] U270.1[机械工程—车辆工程]