A study on inversion method of rotating monopole source for estimating the location of propeller singing noise source

Minseuk Park; Keunhwa Lee; Youngmin Choo; Myungsung Koo; Jungmo Jung

doi:10.7776/ASK.2024.43.6.644

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2024 Vol.43, Issue 6 Preview Page Next Page

Research Article

A study on inversion method of rotating monopole source for estimating the location of propeller singing noise source 프로펠러 명음소음원의 위치 추정을 위한 단극자 회전소음원의 역산 기법

30 November 2024. pp. 644-655

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Abstract

Singing noise refers to the strong noise phenomenon that occurs when vortices separated from the propeller blades resonate with structures. This noise hinders the comfort of the crew and negatively impacts the marine ecosystem, necessitating effective mitigation measures. However, effective analysis of this noise source is challenging due to the frequency modulation phenomenon of the received signal. In this study, we propose an acoustic signal model for analyzing the singing noise and suggest an inversion technique to estimate the location of noise source, assuming it is of a monopole type. This technique provides a method for analyzing singing noise using only a single hydrophone, making it possible to establish the noise reduction measures during the design and operation stages. The proposed inversion technique using the signal model has been validated through experiments and numerical analysis.

Keywords

Singing noise

Doppler effect

Rotating source

Source localization

명음소음은 프로펠러 날개에서 박리되는 와류가 구조물과 공진하여 발생하는 강한 소음현상이다. 명음소음은 발생 시 선원의 안락성을 저해하고 해양생태계에 악영향을 미치기 때문에 효과적인 저감대책이 필요하나, 수신되는 신호의 주파수 변조현상으로 인해 해당 소음원에 대한 효과적인 분석이 어렵다. 본 연구에서는 명음소음의 위치추정을 위한 음향 신호모델을 제안하였고, 명음소음원을 단극자 소음원으로 가정하고 발생위치를 추정할 수 있는 역산기법을 제안하였다. 해당 기법은 단일 청음기만을 이용한 명음소음 분석 방법을 제공하여 설계 및 운용 단계에서 명음소음 방지대책 수립을 가능하게 한다. 제안된 신호모델을 이용한 역산기법은 실험과 수치해석 분석을 통해 성능의 유효성을 검증하였다.

키워드

명음소음

도플러효과

회전 소음원

위치추정

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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 : 43
No :6
Pages :644-655
Received Date : 2024-10-21
Accepted Date : 2024-11-16
DOI :https://doi.org/10.7776/ASK.2024.43.6.644

The Journal of the Acoustical Society of KoreaISSN:1225-4428(Print) 2287-3775(Online)한국음향학회

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