流线型列车隧道单车压力波影响因素数值分析  

Numerical Study of Compression Waves Produced by High-speed Trains with Varying Cross-section Entering a Tunnel

作　　者：耿烽[1] 梅元贵[1] 

机构地区：[1]兰州铁道学院机电与动力工程学院,甘肃兰州730070

出　　处：《兰州铁道学院学报》2002年第4期96-99,共4页Journal of Lanzhou Railway University

基　　金：铁道部科技专项基金项目(J99Z10 1)

摘　　要：依据一维可压缩非定常不等熵流动理论 ,将隧道内空气流动有效截面积看作气体流动时间和流动距离的二元函数 ,建立控制方程 ,利用广义黎曼特征线法 ,对列车进入隧道所形成的隧道压力波进行数值模拟计算 ,而且在不同速度下对列车不同鼻部长度和不同阻塞比的空气动力学效应进行分析 ,并将计算结果与文献数据进行比较 。In this paper, compression waves produced by trains which enter a tunnel at high speed are numerically investigated. The equations of one-dimension unsteady compressible non-isentropic flow in which the area of a tube is dependent on the time and the distance are numerically solved by method of characteristics. The calculations are preformed for trains with various speeds,different nose lengths and cross-sectional area ratios. The effects of these parameters for compression waves are quantitatively clarified. The calculated results are compared with the data of literature, which validates the correctness of the method. The results have developed the existing studies about the kinds of questions.

关 键 词：数值分析 高速列车 压力波 特征线法 铁路隧道 

分 类 号：U459.1[建筑科学—桥梁与隧道工程] U451.3[交通运输工程—道路与铁道工程]