Reduction of Micro-Pressure Wave by Active Control of Propagating Compression Wave in High Speed Train Tunnel
Reduction of Micro-Pressure Wave by Active Control of Propagating Compression Wave in High Speed Train Tunnel
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DOI：
10.1260/0263-0923.23.4.259
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发表时间：
2004-12
期刊：
影响因子：
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通讯作者：
K. Matsubayashi;T. Kosaka;Toshiya Kitamura;S. Yamada;A. Vardy;Jim Brown
中科院分区：
文献类型：
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作者：
K. Matsubayashi;T. Kosaka;Toshiya Kitamura;S. Yamada;A. Vardy;Jim Brown
为了改善高速铁路隧道洞口周围的声环境，对隧道洞口微压波（MPW）的衰减进行了模型试验研究。为了降低MPW的水平，控制波，即正压力，在模型隧道中的侧支处产生，并叠加在通过隧道传播的压缩波的入射波前上。介绍了MPW的主动还原方法和实验装置。通过适当设计的伺服作动器，研究了压缩波和控制波的波形特征。MPW折合水平的实验结果与数值计算结果吻合较好。
For the improvement of the sound environment around a portal of a high speed train tunnel, model experiments for the reduction of MPW (Micro-Pressure Wave) have been studied. In order to reduce the level of MPW, a control wave, that is a positive pressure, is generated at a side-branch in a model tunnel and is superposed on the incident wave front of a compression wave propagating through the tunnel. The method of active reduction of MPW and experimental equipment are shown. Characteristics of the wave forms of the compression wave and the control wave with suitably designed servo actuators were examined. The experimental results of the reduced level of MPW agreed well with numerical calculation results.