楔环连接结构对鱼雷壳体声辐射的影响分析

针对鱼雷楔环连接结构对壳体声辐射的影响问题，综合运用有限元法和边界元法对其进行了分析，首先建立了鱼雷有限元模型，并对模型进行了模态仿真计算，通过试验对模型的准确性进行了验证；通过声学软件LMS Virtual．Lab Acoustics中的边界元法对模型进行了辐射声功率计算，比较了有楔环模型与无楔环模型的声功率曲线，并给出典型频率的声压级云图。仿真结果表明，有楔环状态下的总辐射声功率比无楔环状态下低10dB左右，可为后续鱼雷噪声预报及噪声控制提供参考。

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 established, 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 prediction and noise control of a torpedo.