高速铁路隧道压力波数值分析

The Numerical Prediction of the Pressure Transient Generated by a High Speed Train Passing through a Tunnel

本文根据一维、可压缩、不等熵非定常流体流动理论并利用特征线法发展了高速列车驶入隧道引起隧道内空气压力瞬变的数值模拟方法，并根据该方法初步探讨了喇叭口型隧道减缓压力波的效果。计算结果表明，该方法可作为我国高速铁路隧道设计参数选择的研究工具。隧道设置喇叭状洞口作为减缓压力波的措施是可行的。

An one-dimensional unsteady compressible non-homentropic flow prediction method for calculating the pressure transient generated by a high speed train passing through a tunnel is presented.The numerical procedure is based on the characteristics method.The method is used to investigate the reduction effect of a flared tunnel entrance on the strength of pressure transient.The results of calculation coincide well with that of experiments.The method can be used as a researching tool in high speed railway tunnel design.