摘要
为探究桥梁防护墙的防护作用及列车头车脱轨碰撞防护墙后的运行状态,在Hypermesh软件中建立多种车型列车头车与桥梁防护墙碰撞的有限元模型,研究列车脱轨后与桥梁防护墙的碰撞过程。研究表明:A型动车组头车在无砟轨道上脱轨后,一侧车轮会掉入防护墙与底座板之间的空隙中,车体有明显的爬墙和倾覆趋势,防护墙承受的碰撞力达1 144 kN,防护墙严重破损,碰撞过程较为危险;B型动车组在有砟轨道上脱轨碰撞防护墙过程中,主要碰撞部位集中于设备舱豁口处,该部位会破坏防护墙上层单元进而出现车体爬墙现象,防护墙承受的碰撞力达345 kN;C型机车在有砟轨道上脱轨碰撞防护墙的过程中,碰撞部位集中在排障器边缘处,其切削作用于防护墙,没有出现爬墙现象,故较其他车型更安全,防护墙承受的碰撞力为292 kN。
In order to analyze the protective effect of the bridge protection wall and the running state of train head car after derailment and collision with protection wall, a finite element model is established in the Hypermesh software to study the collision between the head car of various train models and the bridge protection wall. The study shows that: After derailment on the ballastless track, the wheels at one side of Type A EMU head car will fall into the gap between the protection wall and the base plate. The carbody has an obvious climbing and overturning tendency. The collision force on the protection wall reaches 1,144 kN, the protection wall is seriously damaged and the collision process is dangerous. During the derailment and collision of Type B vehicle on the ballasted track, the collision parts are mainly located at the opening of the equipment cabin,which will damage the upper unit of the protection wall and cause the climbing of carbody, and the collision force borne by the protection wall reaches 345 kN. During the derailment and collision of the Type C locomotive on the ballasted track, the collision parts are mainly located at the edge of the cowcatcher, and its cutting acts on the protection wall without climbing phenomenon, so it is safer than other models, and the collision force borne by the protection wall is 292 kN.
作者
吕思雨
敬亭婷
高丹
许伊红
LYU Siyu;JING Tingting;GAO Dan;XU Yihong(Public Transport Research Institute,Chengdu Transportation Planning and Design Institute Co Ltd,Chengdu Sichuan 610000,China)
出处
《中国铁路》
2022年第3期131-138,共8页
China Railway
关键词
铁路桥梁
防护墙
碰撞过程
数值模拟
防护效果
railway bridge
protection wall
collision process
numerical simulation
protective effect
作者简介
第一作者:吕思雨(1994-),女,助理工程师,硕士。E-mail:2036421831@qq.com。
