Proceedings of the Acoustical Society of Korea Conference (한국음향학회:학술대회논문집)

The Acoustical Society of Korea (한국음향학회)
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Tunnel Sonic Boom Analysis using monopole source modeling

홀극음원 모델링을 이용한 고속전철 터널 충격성 소음해석

  • Jung W.T. (AeroAcoustics & Noise control Laboratory, School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Yoon T.S. (AeroAcoustics & Noise control Laboratory, School of Mechanical and Aerospace Engineering, Seoul National University) ;
  • Lee S. (AeroAcoustics & Noise control Laboratory, School of Mechanical and Aerospace Engineering, Seoul National University)
  • 정원태 (서울대학교, 기계항공공학부 공력소음 및 소음제어 실험실) ;
  • 윤태석 (서울대학교, 기계항공공학부 공력소음 및 소음제어 실험실) ;
  • 이수갑 (서울대학교, 기계항공공학부 공력소음 및 소음제어 실험실)
  • Published : 1999.11.06
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Abstract

When a high-speed train enters a tunnel, a compression wave is generated. This wave subsequently emerges from the exit portal of the tunnel, which causes an impulsive noise called 'Sonic boom' or 'micro-pressure wave'. In the present study, new method is presented for prediction of sonic boom noise, especially focusing on the effect of the nose shape of the train on the resultant noise. Acoustic theory for monopole source is used to represent a nose shape of the train in wave equation. Compression wave propagation in tunnel considering tunnel track condition and emission of sonic boom was calculated. The predicted compression waves and impulsive sound waves are compared with recent measurements, and show reasonable agreements.

Keywords