隧道内缓冲结构对高速列车微压波的影响

摘要：
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.

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

A compressive wave will be generated when a high-speed train enters a tunnel. Then the compressive 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.