铁道车辆车轮跳轨全过程计算方法

来源期刊:中南大学学报(自然科学版)2021年第2期

论文作者:向俊 陈林 苏玮 杨海明 龚凯 彭子祥

文章页码:614 - 625

关键词:铁道工程;行车安全;跳轨全过程;轮轨冲击;跳轨高度;跳轨时间

Key words:railway engineering; running safety; whole process of wheel-jumping; wheel-rail impact; wheel-jumping height; wheel-jumping duration

摘    要:为研究提速及高速列车跳轨脱轨机理,提出跳轨车轮位移及轮轨力的基本特征,强调考虑轮轨冲击作用的必要性。在具体计算时,应包含3种完全不同的动力学控制方程,分别是轮轨密贴时的方程、轮轨分离时的方程和轮轨冲击时的方程。研究结果表明:本文方法从本质上揭示了列车车轮跳轨全过程,能够描述车轮跳轨的主要信息;速度越大,车轮跳轨高度越高,跳轨持续时间越长;是否考虑轮轨冲击作用,对于车体加速度、钢轨速度、钢轨加速度、轨枕速度及轨枕加速度等车-轨系统振动响应影响较大。

Abstract: To study the mechanism of train derailment on speed-up and high-speed railway, the basic characteristics of wheel displacement and wheel-rail interaction force during the wheel-jumping process were presented, and the necessity of considering wheel-rail impact was emphasized.In actural calculation, three completely different dynamic governing equations namely the equations of contact, separation and wheel-rail impact stage, should be included. The results show that this developed method essentially reveals the entire process of wheel-jumping of vehicle, and can obtain valuable information of wheel-jumping. The higher the vehicle speed is, the larger the wheel-jumping height, and whether to consider the effect of wheel-rail impact has a great influence on the vibration response of the vehicle-track system such as the acceleration of car body, velocity and acceleration of rail and sleeper.

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