高速铁路隧道洞口地形对微压波的影响分析

高速列车进入隧道后将产生一系列的空气动力学效应，其中隧道出口的微压波效应对人类环境的危害性较大。影响微压波的因素主要有:列车进入隧道的速度、隧道的阻塞比、隧道长度、隧道内部条件和隧道出口地形等。采用数值模拟方法，深入研究了隧道出口地形对微压波的影响，得到了隧道出口地形对微压波的影响特性。

Analysis on Influence of Terrain at Tunnel Exit of Express Railway on Micro-pressure Wave

When high-speed train enters tunnel, a series of aerodynamic effects will be produced, in which the effect of micro-pressure wave at the exit is most harmful to human environment. The main factors affecting the micro-pressure wave are as follows: the trains speed when it enters the tunnel; blockage ratio of the tunnel; length of the tunnel; internal conditions of the tunnel and the terrain at the tunnel exit, etc. By numerical simulation, the influence of the terrain at the tunnel exit on the micro-pressure wave are intensively studied, and then the characteristics thereof are obtained.