列车交会压力波与运行速度的关系  

Correlation between Pressure Wave of Train Passing and Running Speed

作　　者：田红旗[1] 许平[1] 梁习锋[1] 刘堂红[1] 

机构地区：[1]中南大学轨道交通安全教育部重点实验室,湖南长沙410075

出　　处：《中国铁道科学》2006年第6期64-67,共4页China Railway Science

基　　金：国家自然科学基金资助项目(50575227)

摘　　要：随着列车速度的提高,列车交会时产生的瞬态压力冲击对行车安全、旅客舒适性均产生严重影响。根据多次实车试验结果和理论分析,将列车交会分为列车静止交会、等速交会和不等速交会3种工况,研究了3种工况的列车交会压力波与运行速度之间的关系,得到一系列回归关系式。研究结果表明:静止列车上的压力波与交会列车运行速度的平方成正比;两列车等速交会时,列车上的压力波幅值与两交会列车的运行速度和相对速度的平方成正比;两列车不等速交会时,高速列车承受的压力波幅值小于与之交会的低速列车所承受的压力波幅值;两列车等速交会时的压力波大于一方列车静止时交会的压力波。With the increase of train speed, the instantaneous pressure pulse of train passing will seriously influence the operational safety and the comfort degree of the passengers. Based on many results of fullscale test and theoretical analysis, train passing was classified into three categories： one train is static and the other is moving, both trains have uniform velocity and un uniform velocity. The correlation between pressure wave of train passing and the train speed was studied under the abovementioned three conditions, and a series of regressive expressions were obtained. The result shows that the amplitude of the pressurre wave of static train is proportional to the square of the speed of the opposing train, and that of uniform velocity is proportional to the square of the speed of the opposing train and the relative speed. The amplitude of the pressure wave of the quicker train is larger than that of the slower one for the train crossing with un uniform velocity, and the amplitude of the pressure wave with uniform velocity is larger than that of static train.

关 键 词：列车空气动力学 列车交会压力波 列车运行速度 速度比 

分 类 号：U260.11[机械工程—车辆工程]