Effect of Wedged Ring Connection Structure on Noise Radiation of Torpedo Shell

Both finite element method and boundary element method are adopted to analyze the effect of the wedged ring connection structure on the noise radiation of torpedo shell. First, the finite element models for a torpedo are estab-lished, and then the accuracy of the models are verified through modal testing. Second, the models′ radiated sound power is calculated by using the boundary element method in the software LMS Virtual. Lab Acoustics. The curves of sound power for both models with and without wedged ring connection structure are compared, and the sound pressure level contours for typical frequency are obtained. The results indicate that the total sound power of the model with wedged ring structure is 10 dB lower than that of the one without wedged ring structure. This study may facilitate noise predic-tion and noise control of a torpedo.