Generation and alleviation of sonic booms from rail tunnels
Generation and alleviation of sonic booms from rail tunnels
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DOI：
10.1680/eacm.2008.161.3.107
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发表时间：
2008-09
期刊：
影响因子：
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通讯作者：
A. Vardy
中科院分区：
文献类型：
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作者：
A. Vardy
本文介绍了铁路隧道口发出的声爆的起源，并提供了简单的设计表达式，以便估计其振幅，特别是对于较短隧道的常见情况。本文主要针对希望在不需要任何专业软件或专业知识的情况下进行初步评估的设计师。然而，许多参考资料提供了更先进的信息来源。它示出了为什么的扰动的振幅往往会增加隧道长度的情况下，板轨道隧道，但随着长度的情况下，有碴轨道隧道减少。各种补救措施的潜在有效性进行了说明，特别是在隧道入口和出口。一些补救方法也将改善隧道内列车乘客的舒适度，但这在很大程度上是偶然的，因为音爆效应主要受压力变化率的影响，而乘客的舒适度主要受绝对压力的影响。
The origins of sonic booms emitted from railway tunnel portals are described, and simple design expressions are provided to enable their amplitudes to be estimated, especially for the common case of relatively short tunnels. The paper is targeted primarily at designers wishing to make initial assessments without any need for specialist software or specialist expertise. However, many references are provided to sources of more advanced information. It is shown why the amplitudes of the disturbances tend to increase with tunnel length in the case of slab-track tunnels, but to decrease with length in the case of ballast-track tunnels. The potential effectiveness of various remedial measures is described, especially at tunnel entrances and exits. Some remedial methods would also improve comfort levels for passengers on trains in tunnels, but this is largely fortuitous because the sonic boom effect is influenced primarily by rates of change of pressure whereas passenger comfort is influenced primarily by absolu...