隧道内缓冲结构对高速列车微压波的影响

The Influence of Baffle Structure on Micro-pressure Wave Generated by High-speed Train Entering a Tunnel

采用数值方法模拟列车通过隧道的过程,并使用前人的实验数据对计算模型进行了验证.研究了隧道内挡板缓冲结构对微压波强度的影响,揭示挡板装置产生微压波的双峰特征,得到挡板大小和挡板安装位置对微压波强度的影响规律.结果表明,在隧道内合理地安装挡板能有效地削减隧道内压缩波强度,从而削减隧道出口处微压波强度.

A compressive wave will be generated when a high-speed train enters a tunnel. Then the com- pressive wave will travel with the velocity of sound to the outlet of the tunnel and radiate a micro pressure wave into the field outside of the tunnel. A numerical method was used to simulate the process that the high-speed train enters a tunnel. Also the experimental data was used to verify the computational model. On this base, the influence of the baffle structure on the micro-pressure wave was studied. The result shows that two micro-pressure waves will be generated with the baffle assembled in the tunnel. Also we the influence of the position and size of the baffle on the micro-pressure wave was got.