基于NAH的水下航行体噪声源定位仿真研究

NAH-based Simulation Research on Location of Underwater Vehicles' Noise Source

准确地对鱼、水雷等水下航行体式武器装备进行噪声源定位是减振降噪的前提。本文利用近场声全息技术对水下双声源和多声源目标进行仿真研究,对比研究目标声源的理论声压与重构声压的分布,准确对声源中心位置进行定位。取得了很好的重建效果,可见将近场声全息技术应用于水下噪声源定位是可行的,可为降低水下航行体式装备噪声特性提供技术支撑。

Accurately location of underwater vehicles＇ noise source, such as torpedo and mine is the precondition of vibration and noise reduction. In this paper, through simulation research on the underwater double sound source and multiple source target based on Near-field Acoustic Holography, and then comparative study on distribution of theory sound pressure and reconstruction sound pressure of target sound source, can find the center position of sound source. From the result, it can be found that good results of reconstruction are achieved, and near-field acoustic holography technique is feasible to be applied to localization of underwater vehicles ＇noise source, which can provide technical support for reducing the noise characteristics of underwater vehicles equipment.