线间距对400 km/h高速列车隧道交会气动性能的影响  

Influence of Distance between Centers of Tracks on the Aerodynamic Performance of 400 km/h High-speed Trains Meeting in Tunnels

作　　者：张雷[1,2] 林晓龙[3] 尹小放[1,2] 杨明智 王田天[1,2] ZHANG Lei;LIN Xiaolong;YIN Xiaofang;YANG Mingzhi;WANG Tiantian(Central South University,Changsha410075,China;Key Laboratory of Traffic Safety on Track Ministry of Education,Changsha410075,China;China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu610031,China)

机构地区：[1]中南大学,长沙410075 [2]轨道交通安全教育部重点实验室,长沙410075 [3]中铁二院工程集团有限责任公司,成都610031

出　　处：《高速铁路技术》2021年第2期43-49,共7页High Speed Railway Technology

基　　金：中铁二院工程集团有限责任公司科技发展计划项目(KSNQ202061)。

摘　　要：高速列车以速度400 km/h运行时,在隧道内交会产生的交会压力波幅值激增,而线间距作为影响高速列车交会气动性能的关键参数之一,对列车400 km/h运行时隧道内交会压力波的影响特性有待探明。本文采用计算流体力学数值仿真方法和网格滑移技术,分别模拟了5.0 m、5.2 m和5.4 m线间距参数条件下高速列车隧道内交会气动特性,对比分析了不同线间距条件下高速列车表面、隧道壁面压力极值及高速列车气动力特性。研究结果表明:(1)高速列车在100 m^(2)隧道内交会时,线间距对高速列车表面最大交会压力幅值的影响不明显,不考虑鼻尖点,3种线间距对应的高速列车表面最大交会压力波幅值分别为13606 Pa、13688 Pa和13664 Pa,已经超出高速列车结构承载极限±6000 Pa的要求;(2)线间距对隧道壁面最大压力极值的影响不明显,但线间距增加对高速列车交会侧向力及倾覆力矩的缓解效果明显。The amplitude of pressure wave generated by 400 km/h high speed trains meeting in tunnels increases sharply.The distance between centers of tracks is one of the key parameters affecting the aerodynamic performance of high speed trains passing each other,of which the influence characteristics on the meeting pressure wave of 400 km/h trains in tunnels remain to be proved.In this paper,the numerical simulation method of computational fluid mechanics and sliding mesh technology are applied to simulate the aerodynamic characteristics of high speed trains meeting in tunnels under the distance between centers of tracks of 5.0 m,5.2 m and 5.4 m respectively.The extreme pressure on the surface of high speed trains and tunnel walls and the aerodynamic characteristics of high-speed trains under different distance between centers of tracks are compared and analyzed.The research results show that when high speed trains meet in a 100 m^(2)tunnel,the distance between centers of tracks brings no obvious influence on the amplitude of the maximum meeting pressure on the surface of high speed trains.Without considering the nose tip,the amplitude of the maximum meeting pressure on the surface of high speed trains corresponding to the three kinds of distance between centers of tracks is 13606 Pa,13688 Pa and 13664 Pa respectively,which exceed the structural bearing limit of±6000 Pa of high speed trains.The influence of distance between centers of tracks on the maximum pressure on the tunnel wall is not obvious,but the effect of increasing distance between centers of tracks on the release of lateral force and overturning moment of high speed trains passing each other is obvious.

关 键 词：高速列车 线间距 交会压力波 隧道 压力幅值 

分 类 号：U451.3[建筑科学—桥梁与隧道工程]