A Numerical Analysis Study on the Estimation of the 3D Underwater Radiated Noise Pattern using the Hull Vibration Signals

Abstract

In this study, a numerical estimation method for 3D underwater radiated noise pattern using hull vibration and total acoustic power of the vibrating structure in the far-field is proposed. The underwater radiated noise pattern is known to be predicted using the vibration signals and radiation efficiency of each surface patch. But it is very difficult to know radiation efficiency of each surface patch which is one of important factors to calculate the 3D underwater radiated noise pattern. Instead of using radiation efficiency of each patch, the underwater radiated noise level is modified with the total acoustic power of the vibrating structure. The suggested estimation method for underwater radiated noise pattern is discussed with numerical model. . 이때 사용된 방사효율은 방사소 음의 방향성을 고려할 수 없다. Maidanik (1)