nalysis of Low frequency Noise Emitted from High-speed Train with Fluid Model

高速列车低频噪声的流体模型分析

• 批准号: 11650543
• 负责人: YAMADA Shinji
• 金额: $ 2.05万
• 依托单位: Yamanashi University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (C)
• 财政年份: 1999
• 资助国家: 日本
• 起止时间: 1999 至 2001
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-11650543/
• 关键词: Hgh-speed train; Low frequency noise; Yamanashi maglev test line; Tunnel entrance hood; Potential flow model; トンネル

A low frequency noise emitted from a high-speed train was measured at the Yamanashi maglev test line. Sound attenuation with distance, increase of sound level with train speed and influences of a tunnel entrance (hood) on low frequency noise were investigated.Experiments on low frequency noise generation with a 1/100 high-speed train model at a laboratory were carried out. Sound attenuation with distance, and increase of sound level with train speed were measured. These characteristics are accorded to the measurements of the Yamanashi maglev test line.It was shown that a numerical analysis of the low frequency noise generated by a high-speed train was done with a potential flow model around a high-speed train. The increase of sound level with train speed can be explained mathematically from the fluid model. The sound attenuation with distance, the sound level with train length and the frequency characteristics with distance are explained by numerical simulation.It was shown that a nume … More rical analysis of the low frequency noise generated by a high-speed train was done with a potential flow model around a high-speed train. The increase of sound level with train speed can be explained mathematically from the fluid model. The sound attenuation with distance, the sound level with train length and the frequency characteristics with distance are explained by numerical simulation.It was shown that a numerical analysis of the low frequency noise generated by a high-speed train was done with a potential flow model around a high-speed train. The increase of sound level with train speed can be explained mathematically from the fluid model. The sound attenuation with distance, the sound level with train length and the frequency characteristics with distance are explained by numerical simulation.The influence of a tunnel entrance on the low frequency noise was examined with the model train experimental equipment. A tunnel entrance increases the level of low frequency noise around the tunnel entrance.The level of low frequency noise generated bye the high-speed train can be predicted with these results Less

在山梨市磁悬浮试验线上，测量到了高速列车发出的低频噪声。研究了噪声随距离的衰减、声级随列车速度的增加以及隧道入口(引擎盖)对低频噪声的影响，并在实验室进行了1/100高速列车模型的低频噪声产生实验。测量了声场随距离的衰减和声级随列车速度的增大。这些特性与山梨市磁浮试验线的测量结果相吻合。结果表明，采用势流模型对高速列车产生的低频噪声进行了数值分析。声级随列车速度的增加可以从流体模型中得到数学解释。通过数值模拟，解释了声衰减随距离的变化、声级随列车长度的变化以及频率特性随距离的变化规律。结果表明：a NuMe…利用高速列车周围的势流模型，对高速列车产生的低频噪声进行了更为细致的分析。声级随列车速度的增加可以从流体模型中得到数学解释。通过数值模拟解释了声衰减随距离的变化、声级随列车长度的变化以及频率随距离的变化特性，并用势流模型对高速列车产生的低频噪声进行了数值分析。声级随列车速度的增加可以从流体模型中得到数学解释。通过数值模拟解释了声衰减随距离的变化规律、声级随列车长度的变化规律以及频率特性随距离的变化规律，并利用模型列车实验装置考察了隧道入口对低频噪声的影响。隧道入口增加了隧道入口周围的低频噪声水平。这些结果可以较少地预测高速列车产生的低频噪声水平

项目成果

北村敏也: "模型列車のトンネル突入時の入り口周辺の圧力分布"日本音響学会2001年春季研究発表会講演論文集. II. 709-710 (2001)

Toshiya Kitamura：“模型火车进入隧道时入口周围的压力分布”日本声学学会 2001 年春季会议记录 709-710 (2001)。

北村 敏也 他: "高速列車の走行に伴う低周波音のポテンシャル流れモデルによる予測"日本音響学会誌. (掲載予定).

Toshiya Kitamura等人：“使用势流模型预测高速列车运行引起的低频声音”日本声学学会杂志（待出版）。

Toshiya Kitamura, Katsushi Matspbayasi, Toshifumi Kosaka, Shinji Yamada: "Estimation of Low Frequency Noise of High-speed Train with Potential Flow Model"THE JOURNAL OF JHE ACOUSTICAL SOCIETY OF JAPAN. (Now in Printing).

Toshiya Kitamura、Katsushi Matspbayasi、Toshifumi Kosaka、Shinji Yamada：“利用势流模型估计高速列车的低频噪声”日本 JHE 声学学会杂志。

北村 敏也 他: "高速列車のトンネル突入時に発生する低周波音に関する研究"第11回環境工学総合シンポジウム2001講演論文集. 120-122 (2001)

Toshiya Kitamura等：“高速列车进入隧道时产生的低频噪声的研究”2001年第十一届环境工程研讨会论文集。120-122（2001）