EFFECTIVE NOISE SHAPE FOR REDUCING TUNNEL SONIC BOOM

When a train nose enters a tunnel at a high speed, an impulsive pressure wave ('tunnel sonic boom' or 'micro-pressure wave') radiates from the tunnel exit. Therefore it is necessary to make the nose shape of the high speed train effective for reducing the tunnel sonic boom. In this paper, the effect of the train nose shape is investigated using numerical simulation of the tunnel entry problem. The nose shapes dealt with here are 1) fundamental nose shapes, 2) optimum nose shape obtained by nonlinear optimization method, and 3) the nose shape of the 500-series Shinkansen train which runs at 300km/h (186m/h) for the first time on Japan.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/oclc/3127232
• Corporate Authors:

  Railway Technical Research Institute

  2-8-38, Hikari-cho, Kokubunji-shi
  Tokyo 185,   Japan 
• Authors:
  • Iida
  • Matsumara, Takeshi
  • NAKATANI, K
  • Fukuda, T
  • Maeda, T
• Publication Date: 1997-11

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 206-211
• Serial:
  • Railway Technical Research Institute, Quarterly Reports
  • Volume: 38
  • Issue Number: 4
  • Publisher: Railway Technical Research Institute/Tetsudo Gijutsu Kenkyujo
  • ISSN: 0033-9008
  • Serial URL: http://www.rtri.or.jp/eng/

Subject/Index Terms

• TRT Terms: Compressive strength; High speed rail; Infrasound; Sonic boom; Vehicle design
• Old TRIS Terms: Tunnel pressures
• Subject Areas: Design; Railroads; Vehicles and Equipment;

Filing Info

• Accession Number: 00744622
• Record Type: Publication
• Files: TRIS
• Created Date: Jan 14 1998 12:00AM