中文摘要：

高速列车隧道进口波属于次声波范畴,其强度比微气压波要弱,但随着高速列车的不断提速,也会造成新的环境问题。文章采用有限体积方法和任意滑移界面动网格技术方法,并结合PISO算法和SST k-ω高雷诺数湍流模型,对CRH3高速列车通过隧道产生的进口波特性进行了数值模拟研究。研究结果表明,隧道进口波由列车头部和尾部驶入隧道时产生的负、正压力脉冲波构成,其传播具有指向性和随距离增加的衰减性。此外,进口波的幅值与观测距离近似成反比,与车速的三次方近似成正比。

英文摘要：

Although the pressure wave generated at a tunnel entrance is an infrasonic one with an intensity that isusually weaker than that of a micro-pressure wave, it may induce some new environmental problems if train speed isincreased in the future. In this paper,a numerical simulation study is conducted regarding the properties of a pres-sure wave at a tunnel entrance that is generated by a high-speed train CRH3 running into the tunnel by using the fi-nite volume method, the dynamic mesh technique of the arbitrary sliding interface（ASI） method, a PISO algorithmand a SST turbulence model with high Reynolds numbers. The results show that the pressure wave generated at atunnel entrance is made up of negative and positive pressure pulses emitted from the train head and tail while thetrain is running into the tunnel, and it has the features of directional propagation and attenuation with an increase ofdistance. Furthermore, the amplitude of the entrance wave is inversely proportional to the observation distance andproportional to the cube of the train speed.