Submarine bistatic target strength analysis based on bistatic-to-monostatic conversion

Kookhyun Kim; Sung-Ju Park; Keunhwa Lee; Dae-Seung Cho

doi:10.7776/ASK.2024.43.1.138

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2024 Vol.43, Issue 1 Preview Page

Research Article

Submarine bistatic target strength analysis based on bistatic-to-monostatic conversion 양상태-단상태 변환 기반 잠수함 양상태 표적강도 해석

31 January 2024. pp. 138-144

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Abstract

This paper presents a bistatic to monostatic conversion technique to analyze the bistatic target strength of submarines. The technique involves determining the transmission path length of acoustic waves, which are emitted from a source, scattered off an underwater target, and eventually received by a receiver. By generating a corresponding virtual scattering surface, this method effectively transforms the target strength analysis problem from bistatic to monostatic. The converted monostatic target strength problem can be assessed using a well-established monostatic numerical methods. The bistatic target strength analysis for Benchmark Target Strength Simulation (BeTTSi), a widely used target strength model were performed. The results were compared with those calculated by boundary element methods and Kirchhoff approximation, and confirmed the validity and the practical applicability of the proposed analysis technique for evaluating submarine target strength.

Keywords

Bistatic target strength

Bistatic to monostatic conversion

Equivalent transmission-path length

Equi-phase virtual scattering surface

본 논문에서는 잠수함 양상태 표적강도 해석을 위한 양상태-단상태 변환 기법을 제안하였다. 이 기법은 송신 음원이 수중 표적면에 의해 산란된 후 수신자에 도달하는 음파 전달 경로 길이를 산정하고, 이에 상응하는 가상 산란면을 생성함으로써, 수중 표적의 표적강도 문제를 양상태에서 단상태로 변환하는 방법이다. 변환된 단상태 표적강도 문제는 기 정립된 단상태 표적강도 수치 해석 기법을 활용하여 양상태 표적강도를 평가한다. 표적강도 표준 모델로 활용되고 있는 BeTTSi에 대한 양상태 표적강도 해석을 수행하였으며, 그 결과는 경계 요소법과 키르히호프 근사에 의한 해석 결과와 비교하여 제안된 해석 기법의 신뢰성과 잠수함 표적강도 평가 도구로서의 실무 활용성을 확인하였다.

키워드

양상태 표적강도

양상태-단상태 변환

등가 전달경로 길이

등위상 가상 산란면

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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 :1
Pages :138-144
Received Date : 2023-11-07
Revised Date : 2023-12-06
Accepted Date : 2023-12-20
DOI :https://doi.org/10.7776/ASK.2024.43.1.138

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

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