弹性车轮对地铁列车碰撞安全性的影响  

Effect of Resilient Wheels on Metro Train Crash Safety

作　　者：杨皓杰 肖守讷[1] 高天阳 YANG Haojie;XIAO Shoune;GAO Tianyang(State Key Laboratory of Traction Power,Southwest Jiaotong University,Chengdu 610031,Chin)

机构地区：[1]西南交通大学牵引动力国家重点实验室,四川成都610031

出　　处：《机械制造与自动化》2018年第6期16-19,34,共5页Machine Building & Automation

基　　金：国家重点研发计划课题(2016YFB1200505-009; 2016YFB1200403-A-03)

摘　　要：为了研究弹性车轮在碰撞过程中对地铁列车安全性的影响,以某4节编组地铁列车为研究对象,建立了分别采用弹性车轮和刚性车轮的地铁车辆有限元模型。设计了载客量为空载和定员载荷的情况下,地铁列车以25 km/h速度分别在直线轨道和半径为800 m的曲线轨道上碰撞另一列相同的静止列车的8种碰撞场景,使用LS-DYNA显示动力学软件模拟碰撞过程。研究结果表明:和刚性轮相比,弹性车轮的车轮抬升量在空载工况下能够大幅度地减少,而在定员载荷工况下其略有增加;在不同的载荷工况下,弹性轮都能够在一定程度上减少轮重减载超过限值0.65的最大作用时间,并大大降低了曲线轨道上脱轨系数的最大值及其超过限值1.0的最大作用时间。To study the effect of resilient wheels on metro train crash safety in the crash process,this paper takes the 4-module metro train as the research object and establishes the finite element models of metro trains with resilient wheels and rigid wheels respectively.Under the conditions of no-load and fixed number of passengers,LS-DYNA software is used to simutute the eight impact scenarios that the train impacts against the same stationary train at the speed of 25 km/h on straight tracks and curved tracks with radius of 800 m.Results show that compared with the rigid wheel,the wheel vertical rise of the resilient wheels greatly decreases under no-load condition,but it increases slightly under fixed number of passengers condition.Under different load conditions,the resilient wheels decrease the most effective time,the wheel unloading rate exceeds the limit of 0.65,in addition,it can greatly reduce the derailment coefficient and decrease the effective time,the derailment coefficient exceeds the limit of 1.0 on curved tracks.

关 键 词：弹性车轮 安全性 车轮抬升量 脱轨系数 轮重减载率 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术]