随着铁路高速化的不断发展，高速列车通过隧道时诱发压力波引起的乘客舒适度问题越来越受到关注。采用一维可压缩非定常流动模型和特征线法能够准确地计算多种工况下隧道单车压力波和会车压力波。在计算中，列车壁面与隧道壁面摩擦特性、隧道内车头、车尾处三维流动特性、隧道端口处流动特性均用经验系数来表示。这些参数对于隧道压力波的准确计算是非常重要的。根据一维不可压缩流动理论，建立了确定上述相关流动特性经验系数的计算程序，通过与国外实验数据对比表明了程序的正确性，为今后现车试验、模型试验中这些经验系数的确定提供了有效的工具。

The passenger comfortability induced by the pressure waves generated by the passage of highspeed trains in a tunnel is a matter of concern. The singletrain waves and trainmeeting waves can be calculated using the onedimensional unsteady compressible flow model and the method of characteristics. The trainwall friction, the threedimensional flow of nose and tail of the train in the tunnel and the port flow of the tunnel are all expressed by the empirical coefficients, which are important for the calculation of the pressure waves in the tunnel. The onedimensional uncompressible flow theory is used to establish the computation procedure in this paper. The results show that the computation procedure is effective in comparison with foreign test data.