Passive Control of Micro-Pressure Wave from High-Speed Railway Tunnel

高铁隧道微压力波的被动控制

• 批准号: 09650193
• 负责人: AOKI Toshiyuki
• 金额: $ 2.11万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1997
• 资助国家: 日本
• 起止时间: 1997 至 1998
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09650193/
• 关键词: High Speed Train; Tunnel; Micro-Pressure Wave; Passive Control; Pressure Wave; Unsteady Flow; Interaction; Noise Reduction; パッシプコントロール; 高速列車; 騒音; 圧縮波; 衝撃波

Simple expansion chambers close to a tunnel exit portal can cause significant reductions in the amplitudes of micro-pressure waves propagating outside the tunnel.1. The optimum shape of such chambers depends upon the steepness of the reflecting wavefront. Greatest percentage reductions are achieved for the steepest wavefronts.2. When a range of steepnesses of incident wavefronts is expected, the chamber shape should be optimized for the steepest case that is considered feasible. This will provide greatest benefit when it is most needed. In most cases, this shape will also perform well with less steep wavefronts even though it is not optimum.3. For any particular incident wavefront steepness, the optimum shape of the chambers is dependent on the chamber size. For the steep wavefronts of greatest relevance herein, however, the dependence is not strong.4. Typically, a well-designed chamber with a unit volume of tunnel may cause a reduction of about 30% in the magnitudes of micro-pressure waves. This is in addition to reductions resulting from other modifications (e.g., at the tunnel entry).

靠近隧道出口的简单膨胀室可以显著降低隧道外传播的微压力波的振幅。1.这种腔室的最佳形状取决于反射波阵面的陡度。最大的百分比减少实现了最陡的波前。2.当预期入射波前的陡度范围时，应针对被认为可行的最陡情况优化腔室形状。这将在最需要的时候提供最大的好处。在大多数情况下，这种形状也将表现良好，不太陡峭的波前，即使它不是最佳的。3.对于任何特定的入射波前陡度，腔室的最佳形状取决于腔室尺寸。然而，对于本文中最相关的陡峭波前，相关性并不强。通常，具有单位体积隧道的良好设计的腔室可以导致微压力波的幅度减小约30%。这是除其他修改（例如，隧道入口处）。

项目成果

S.Nakao, T.Aoki, K.Matsuo: "Ballast Effect on Attenuation and Distortion of Pressure Wave Propagating in High-Speed Railway Tunnel" Proc. of 4th KSME-JSME Fluid Eng. Conf.1. 161-164 (1998)

S.Nakao、T.Aoki、K.Matsuo：“高速铁路隧道中压力波传播的衰减和畸变的道碴效应”Proc。

S.Nakao: "Passive Controlling a Blast Sound of Pressure Wave Emitting from an Open-End Circular Tube" Engineering Sciences Reports, Kyushu University. 21-1. 1-6 (1999)

S.Nakao：“被动控制从开口圆管发出的压力波爆炸声”工程科学报告，九州大学。

仲尾晋一郎,青木俊之,他2名: "断面積一定の管内を伝ぱるす圧力波の減衰と変形" 日本機会学会論文集(B編). 65・629. 198-203 (1999)

Shinichiro Nakao、Toshiyuki Aoki 等 2 人：“在具有恒定横截面积的管道中传播的压力波的衰减和变形”日本机械工程师学会会议记录（编辑 B） 198-203。 1999）

Toshiyuki AOKI: "Passive Alleviation of Micro-Pressure Wave from Tunnel Portals" Journal of Sound and Vibration. 220・5. 921-940 (1999)

Toshiyuki AOKI：“隧道入口微压力波的被动缓解”《声音与振动杂志》220・5（1999）。

仲尾晋一郎: "円管開口端からの圧力波の放出による衝撃音のパッシブコントロール" 九州大学総合理工学研究科報告. 21・1. 1-6 (1999)

中尾真一郎：“通过从圆形管道的开口端发射压力波来被动控制冲击噪声”九州大学研究生院理工学报告21・1（1999）。