Journal of the Society of Naval Architects of Korea (대한조선학회논문집)

The Society of Naval Architects of Korea (대한조선학회)
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Analysis of Underwater Radiated Noise in Accordance with the ISO Standard and Class Notations Using the Hybrid Sound Propagation Model

하이브리드 음전달 모델을 이용한 ISO 및 선급별 수중방사소음 전달 특성 분석

  • Received : 2022.09.02
  • Accepted : 2022.10.16
  • Published : 2022.12.20
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Abstract

As considerable interests in noise emission from the ships have been increased, International Maritime Organization (IMO) standardized the Underwater Radiated Noise (URN) measurement process of commercial ships in deep seas by enacting the related ISO standard ISO 17208-1 and classification societies responded with the enactment or revision of corresponding notations. According to this trend, a new hybrid underwater sound propagation model based on underwater sound propagation theories was developed and its accuracy on analysis was verified through the result comparison with the results of other generally used models. Using the verified model, each URN propagation characteristics adjusted by the correction methods proposed in the ISO standard and class notations were analyzed and compared in two assumed URN measurement cases. The results showed that the effects of transmission loss corrections in the circumstances with less bottom reflections generally similar but they had rather large differences in the model analysis results with bottom-reflection-dominant conditions. It was concluded that the deep consideration of effective bottom-reflection-correction method should be made in future revisions of ISO standard and class notations.

Keywords

Acknowledgement

본 논문은 해양수산부 2021년도 해양산업 수요기술개발사업 <인공지능을 이용한 하이브리드 음전달 모델 선박 수중방사소음 분석 프로그램 개발> 과제의 일환으로 작성되었습니다.

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