高速列车隧道会车压力波的数值分析方法

Numerical method on transient pressure with high speed trains crossing through a tunnel

根据一维可压缩不等熵非定常流体流动理论和广义黎曼变量特征线法 ,提出了研究高速列车隧道会车压力波较完整的物理模型 ,并将广义黎曼变量特征线法应用于列车几何尺寸不同条件下的等速会车和混行会车的压力波计算。与国外代表性的现场实测和计算结果比较 ,本文结果有较高的计算精度 ,流动模型和计算方法正确可行。

A one dimensional unsteady compressible non isentropic flow prediction method for calculating transient pressure waves generated by high speed trains crossing through a single bore tunnel is proposed. This numerical procedure is based on the method of characteristics expressed with generalized Riemann Variables. Most important factors affecting airflow in tunnel are considered. This procedure can be applied to calculate pressure waves for the equal speed and nonequal speed train crossings with different train length. The calculated results show that the numerical prediction method and model are reasonable.