高速列车过隧道时对接触网安全性的影响分析

摘要

In order to study the influences on catenary’s safety by high-speed train passing through the tunnel, the numerical simulation method and the sliding mesh technology are used to simulate respectively the processes of different high-speed train combinations passing through single track tunnel and double track tunnel at the speed of 350 km/h. The characteristics of piston wind in the tunnel by are obtained monitoring the air velocity and air pressure at the davit. Based on aerodynamic performance simulation results, the wind-induced vibration response of the contact line is simulated to obtain the range of the aerodynamic noise and the contact line displacement. The results show that the speed of the train winds is increasing with the increase of the train length and train speed and the decrease of the tunnel section, the higher the train speed, the more remarkable the aerodynamic performance. The contact line has the maximum forward displacement of 2. 92 mm the moment when the train enters the tunnel.%为研究高速列车过隧道时对接触网系统安全性的影响，采用数值模拟的方法，利用滑移网格技术，对不同编组的高速列车以350 km/h的速度分别通过单线隧道和双线隧道的过程进行仿真，通过监测吊柱位置处的气流速度和气体压力，得到隧道内活塞风特性；基于气动特性仿真结果，对接触线风振响应进行模拟仿真，得到隧道内接触线位移偏量范围。结果表明，列车编组越多，隧道断面越小，列车车速越大，形成的列车风速度越大，气动特性越显著；列车进入隧道入口瞬间，接触线有最大正向位移偏量为2.92 mm。