Alleviation of Super Low Frequency Noise Generated by a High-speed Train Passing thorough a Tunnel

高速列车通过隧道时产生的超低频噪声的缓解

• 批准号: 13650184
• 负责人: AOKI Toshiyuki
• 金额: $ 2.3万
• 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: 2001
• 资助国家: 日本
• 起止时间: 2001 至 2002
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13650184/
• 关键词: High Speed Train; Tunnel; Low Frequency Noise; Noise Alleviation; Pressure Wave; Micro Pressure Wave

(1) To accomplish the railway tunnel simulator, a fast opening gate valve was developed. The formation of the compression wave in a simulator are reproduced with a good quality.(2) Three-dimensional numerical analysis was developed on an impulse sound emitted from an exit of high-speed railway tunnel.(3) The effects of expansion chambers for super low frequency noise are investigated numerically and experimentally.(4) The higher mode waves on the reflected expansion wave and the emitted impulse sound develops due to the reflecting process of a pressure wave at the tunnel exit.(5) The directivity of impulse sound changes when the emitted solid angle decreases. Therefore, the change of magnitude of impulse sound is small when the emitted angle is larger than 45 degrees.(6) Optimum location of exit expansion chambers are found and the noise directivity have been clarifed.

(1)为实现铁路隧道仿真，研制了一种快速开启闸阀。在模拟器中较好地再现了压缩波的形成过程。(2)对高速铁路隧道出口发出的脉冲声进行了三维数值分析。(3)通过数值和实验研究了膨胀室对超低频噪声的影响。(4)反射膨胀波和发射脉冲声上的高模态波是由于隧道出口压力波的反射过程而形成的。(5)脉冲声的指向性随着发射立体角的减小而变化。因此，当发射角大于45度时，脉冲声的振幅变化很小。(6)找到了出口膨胀室的最佳位置，明确了噪声指向性。

项目成果

Toshiyuki AOKI, et.al.: "A study of impulsive wave dischrged from the inclined exit of a pipe"Proc.5th JSME-KSME Fluids Engineering Conf.. 1. 1-6 (2002)

Toshiyuki AOKI, et.al.：“从管道倾斜出口排出的脉冲波的研究”Proc.5th JSME-KSME Fluids Engineering Conf.. 1. 1-6 (2002)

T.Aoki, 他4名: "A study of impulsivewave dischrged from the inclined exit of a pipe"Proc. 5th JSME-KSME Fluids Engineering Conf.. 1. 1-6 (2002)

T.Aoki等4人：“从管道倾斜出口排出的脉冲波的研究”Proc. 5th JSME-KSME Fluids Engineering Conf.. 1. 1-6 (2002)

青木俊之, 他2名: "高速鉄道トンネル出口から発生する微気圧波のパッシブコントロール"可視化情報. 20-s1. 309-312 (2002)

Toshiyuki Aoki 等 2 人：“高速铁路隧道出口产生的微压力波的被动控制”可视化信息。

T.Aoki, K.Matsuo: "Impulse sound caused by discharging compression wave from high-speed railway tunnel"Proc. 8th Int. Cong. on Sound and Vibration. 42. 2289-2296 (2001)

T.Aoki，K.Matsuo：“高速铁路隧道释放压缩波引起的脉冲声”Proc。

Toshiyuki AOKI, Kazuyasu MATSUO: "Impulse sound caused by discharging compression wave from high-speed railway tunnel"Proc.8th Int.Cong.on Sound and Vibration. 42. 2289-2296 (2001)

Toshiyuki AOKI、Kazuyasu MATSUO：“高速铁路隧道释放压缩波引起的脉冲声”Proc.8th Int.Cong.on Sound and Vibration。