横通道设置对车隧气动多波峰的影响

为了研究横通道设置对压力波传播特性的影响，基于列车进入隧道所产生的压缩波在隧道与横通道交叉点的传播、反射理论，采用三维数值方法对设置横通道情况下的压力波传播特性进行了分析，对横通道设置不同位置时缓解微气压波的效果进行了比较.研究表明:首波压力梯度在列车进入隧道较短范围内（10 m）即达到峰值，横通道距隧道洞口距离增大，会使列车经过横通道所产生的2次波压力梯度峰值减弱，横通道距洞口距离由20 m调整为50 m，可使2次波峰值降低50%. 

Analysis of Effect of Cross Adit on Train-Tunnel Aerodynamic Multiple Peak Characteristics

For research the effect of setting cross adit to compression wave transmission characteristic, A cross adit near the tunnel entrance relieves the peak of a micro-compression wave; additionally, it also affects the transmission characteristics of the compression wave. In this study, on the basis of the transmission and reflection theory of compression waves, created when a high-speed train enters the tunnel, at the cross point of a tunnel and an adit, the effect of a cross adit on compression wave transmission characteristics was analysed using a three-dimensional model. Furthermore, various cross adit positions were compared in terms of their efficiency in relieving micro-compression waves. The research results showed that when the train enters approximately 10 m into the tunnel, the peak value of the first wave pressure gradient is attained. With increasing distance between the cross adit and tunnel entrance, the peak value of the pressure gradient of the second wave, created when the train passes the cross adit, decreases slightly. When the distance between the cross adit position and the tunnel entrance is changed from 20 m to 50 m, the pressure gradient peak value decreases by up to 50%.