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首页> 外文会议>International Congress on Sound and Vibration >IMPULSE SOUND CAUSED BY DISCHARGING COMPRESSION WAVE FROM HIGH-SPEED RAILWAY TUNNEL
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IMPULSE SOUND CAUSED BY DISCHARGING COMPRESSION WAVE FROM HIGH-SPEED RAILWAY TUNNEL

机译：来自高速铁路隧道的压缩波引起的脉冲声音

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摘要

When a high-speed railway train enters a tunnel, a compression wave is generated ahead of the train and propagates along the tunnel. This wave subsequently emerges from the exit portal of the tunnel as an impulse sound which may cause noise problems in the surrounding area. During the process of reflection and radiation, the flow at tunnel exit is very complex due to three-dimensional phenomena. The present paper studies the reflection process of a propagating compression wave from a tunnel exit and the generation mechanism of an impulse sound emitted from the tunnel exit. Three-dimensional numerical analysis is carried out for the discharge of a propagation compression wave from the tunnel exit with or without a side wall at the exit. The process of generating the impulse sound and the influence of the shape of runnel exit are discussed.
机译：当高速铁路列车进入隧道时，压缩波在火车之前产生并沿着隧道传播。该波随后从隧道的出口门户中出现，作为脉冲声音，这可能导致周围区域中的噪声问题。在反射和辐射过程中，由于三维现象，隧道退出的流量非常复杂。本文研究了从隧道出口的传播压缩波的反射过程和从隧道出口发出的脉冲声音的产生机制。对从隧道出口的传播压缩波进行三维数值分析，在出口处或没有侧壁的隧道出口排出。讨论了产生脉冲声音的过程和脉冲出口形状的影响。

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