明线会车压力波幅变化规律研究  

Air Pressure Pulse Developing Regularity of High-speed Trains Crossing in Open Air

作　　者：李人宪[1,2] 刘杰[1] 戚振宕[1] 张卫华[2] 

机构地区：[1]西南交通大学机械工程学院,成都610031 [2]西南交通大学牵引动力国家重点实验室,成都610031

出　　处：《机械工程学报》2011年第4期125-130,共6页Journal of Mechanical Engineering

基　　金：高校创新培育基金(705044);国家杰出青年科学基金(50525518)资助项目

摘　　要：两列车高速相向运行过程中产生的气动压力波,有可能对列车及其线路造成不利影响,引起强度问题、运行稳定性问题、轮轨磨损问题和安全问题。特别是高速列车运营以来,世界各国的铁路工作者一直希望了解会车压力波随车速和线路间距等参数的变化规律,但至今仍没有一个统一的认识。依据计算流体力学方程,利用有限体积数值求解方法,仿真分析4.26～5.26 m,6种线路间距,从静止到500 km/h时速的38种会车速度,共计100余种运行工况下的会车过程,获得会车压力波幅系数、正压波幅系数和负压波幅系数与线路间距及列车交会速度间的变化规律,得到任意车速会车时三者间统一的关系式。可为高速列车设计和高速铁路建设提供参考。The air pressure pulse produced by two high-speed trains crossing will cause unfavorable effects on running trains and railways and give rise to strength problem,running stability problem,abrasion problem between wheels and tracks and operation safety problem.Railway engineers all over the world have wanted to understand the developing regularity of the air pressure pulse since high-speed trains operation from 1960s,yet there is no unanimous opinion up to now.Based on computational fluid dynamics equations and finite volume numerical method,the processes of trains crossing are simulated.About 100 operating cases include 6 track distances,from 4.26 m to 5.26 m,and 38 speeds of trains crossing,from zero to 500 km/h,are calculated.A developing regularity of the air pressure pulse amplitude related with track distance and speeds of two trains crossing each other is obtained.At the same time,the developing regularities of the positive air pulse amplitude and the negative air pulse amplitude related with the same factors are also obtained.The formula for calculating the air pressure pulse amplitude provides reference for design of high-speed trains and construction of high-speed railways.

关 键 词：高速列车 会车压力波 数值计算 

分 类 号：U211[交通运输工程—道路与铁道工程]