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

Research Project

Project/Area Number 11650543
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 交通工学・国土計画
Research InstitutionYamanashi University

Principal Investigator

YAMADA Shinji  Yamanashi University Faculty of Engineering, Professor, 工学部, 教授 (90020403)

Co-Investigator(Kenkyū-buntansha) KITAMURA Toshiya  Yamanashi University Faculty of Engineering, Assistant Professor, 工学部, 助手 (80224971)
Project Period (FY) 1999 – 2001
Project Status Completed (Fiscal Year 2001)
Budget Amount *help
¥3,200,000 (Direct Cost: ¥3,200,000)
Fiscal Year 2001: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 2000: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1999: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsHgh-speed train / Low frequency noise / Yamanashi maglev test line / Tunnel entrance hood / Potential flow model / トンネル
Research Abstract

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

Report

(4 results)
  • 2001 Annual Research Report   Final Research Report Summary
  • 2000 Annual Research Report
  • 1999 Annual Research Report
  • Research Products

    (5 results)

All Other

All Publications (5 results)

  • [Publications] 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).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 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).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2001 Final Research Report Summary
  • [Publications] 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)

    • Related Report
      2001 Annual Research Report
  • [Publications] 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).

    • Related Report
      2001 Annual Research Report
  • [Publications] 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)

    • Related Report
      2000 Annual Research Report

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Published: 1999-04-01   Modified: 2016-04-21  

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