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2016 Vol.35, Issue 4
Long range incoherent seafloor reverberation model based on coupled normal mode method

연성모드법 기반의 원거리 비상관 해저면 잔향음 모델

Jungyong Park1
,
Youngmin Choo2
,
Keunhwa Lee3
,
Woojae Seong2*
박 중용1
,
추 영민2
,
이 근화3
,
성 우제2*
2Department of Naval Architecture and Ocean Engineering/ RIMSE
1서울대학교 조선해양공학과
2서울대학교 조선해양공학과/해양시스템공학연구소
3세종대학교 국방시스템공학과
*교신저자. *Corresponding Author. 
31 July 2016. pp. 243-252
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Abstract

In this paper, the incoherent reverberation model based on coupled normal mode method is presented. In the range dependent environment, one way coupled normal mode method is used to calculate the pressure from a source to a scatterer patch and the pressure from a scatterer patch to a receiver. For the computational efficiency, the sound propagation from a source/receiver to the scatterer patch is assumed to occur only in the 2D plane where a source/receiver and scatterer patch are located. For the model verification, problems of the reverberation modeling workshop I and II sponsored by the US office of Naval Research are calculated and the results are compared with the incoherent reverberation model results based on the ray method.

Keywords
Bistatic incoherent reverberation
Coupled normal mode method
Range dependent environment

본 논문에서는 연성 모드 기반의 양상태 비상관 잔향음 모델을 제안한다. 거리종속 환경에서 단방향 연성 모드 기반의 음파전달모델을 사용하여 음원에서의 산란체에 도달하는 음압과 산란체에서 수신원에 도달하는 음압을 계산한다. 계산의 편의 상 각 산란체와 음원 또는 수신기 사이의 음파전달은 산란체와 음원 또는 수신기를 잇는 2차원 평면에서만 일어난다고 가정한다. 모델의 타당성을 검증하기 위해, 미 해군 잔향음 모델링 워크숍 I, II에 제시된 문제에 대해 계산하고, 그 결과를 음선 이론 기반의 비상관 잔향음 결과와 비교했다.

키워드
양상태 비상관 잔향음
연성모드법
거리 종속 환경
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Information
  • Publisher :The Acoustical Society of Korea
  • Publisher(Ko) :한국음향학회
  • Journal Title :The Journal of the Acoustical Society of Korea
  • Journal Title(Ko) :한국음향학회지
  • Volume : 35
  • No :4
  • Pages :243-252
  • Received Date : 2016-03-12
  • Revised Date : 2016-05-09
  • Accepted Date : 2016-07-07
  • DOI :https://doi.org/10.7776/ASK.2016.35.4.243
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