수중실험을 통한 원통구조물의 3차원 수중방사소음 패턴 산출기법 분석

다국어 초록 (Multilingual Abstract)

In this study for the prediction of 3D underwater radiated noise pattern, a comparison between the proposed method(DHIE, Discrete Helmholtz Integral Equation) and the 3D underwater radiated noise calculation results using the measurement of near-field acoustic pressure data is performed. The near-field acoustic pressure in water is measured for the calculation of the far-field radiated noise pattern and the far-field acoustic power. Also the vibration field of the underwater structure is measured in simultaneously. Using the total far-field acoustic power and the vibration field on the surface of the structure, the proposed method(DHIE) can predict the underwater radiated noise pattern of the far-field The predicted results show the reasonable agreement within about 5dB comparing with the experiment result.

참고문헌 (Reference)

1 한형석, "선체진동을 이용한 함정의 수중방사소음 예측" 한국소음진동공학회 23 (23): 394-400, 2013

2 한형석, "선체 구성 강판의 종류 및 고유진동수를 고려한 선체의 음향방사효율 추정" 한국소음진동공학회 23 (23): 1073-1081, 2013

3 정우진, "방사효율과 방사방향 계수에 대한 새로운 산출기법 연구" 한국소음진동공학회 24 (24): 90-101, 2014

4 "dBVision User’s Manual"

5 Maidanik, G., "Response of Ribbed Panels to Reverberant Acoustic Fields" 34 (34): 802-826, 1962

6 Uchida, S., "Prediction of Underwater Noise Radiated form Ship’s Hull" (686) : 36-45, 1986

7 Musha, T., "Numerical Calculation for Determining Sonar Self Noise Source due to the Structural Vibration" 69 : 19-32, 1999

8 Musha, T., "Far-field Radiated Noise Prediction using the Cross-spectrum of Surface Vibration Velocity" (16) : 381-383, 1995

9 Yi, J. J., "A Study of the Prediction of Far Field of the Stiffened Cylinder Using Surface Vibration Field and Radiation Efficiency in Air" 2272-2275, 2013