원통형 배열센서 후면 구조물에 의해 발생하는 허위 표적 감소를 위한 음향 배플 연구

다국어 초록 (Multilingual Abstract)

Acoustic signal is emitted from a vessel and received by a cylindrical array sensor at some distance from the vessel. Acoustic signal is the source for a cylindrical array sensor which is designed to detect the acoustic signal. Cylindrical array sensors seldom have an ideal hydrodynamic shape and are not sufficiently robust to survive without some protection and they are normally housed in a sonar dome. Reflected signals by some structure inside a sonar dome make unwanted signals. Therefore, an acoustic baffle is used to minimize unwanted signals. The performance of the acoustic baffles can be determined from the acoustic numerical analysis at the design stage. In this study, finite element method was used to analyze the acoustic field around the cylindrical array sensor and baffle effects. The baffle performance can be defined the echo reduction. To show the baffle performance, the specimens were made for pulse tube test and echo reductions were measured during the test. In this paper, the effect of echo reduction of the acoustic baffle was discussed.

참고문헌 (Reference)

1 서영수, "수중 음향재료의 음향성능 설계기법 연구" 한국소음진동공학회 23 (23): 920-927, 2013

2 서영수, "수중 음향재료의 반향음 감소성능 연구" 한국소음진동공학회 24 (24): 868-875, 2014

3 Kinsler, L. E., "Fundamentals of Acoustics" John Wiley & Sons, Inc 2000

4 "COMSOL 4.3 User’s Guide"

5 권현웅, "Beam Tracing 기법을 이용한 수동 소나 센서의 수신 음압해석 프로그램 개발" 대한조선학회 50 (50): 190-198, 2013