拖曳线列阵流噪声抑制实验  

Experimental Study on Flow Noise Suppression of Towed Arrays

作　　者：祝献[1] 葛辉良[1] 

机构地区：[1]杭州应用声学研究所声纳技术重点实验室,杭州310023

出　　处：《噪声与振动控制》2016年第3期219-221,共3页Noise and Vibration Control

摘　　要：拖曳流噪声主要由流激缆阵振动和湍流边界层起伏压力引起的两大类噪声组成。已有研究表明当拖曳线列阵声纳达到一定拖速后,流噪声是限制低频拖曳线列阵声纳探测性能的主要因素,因此,研究流噪声抑制方法对提高低频拖曳线列阵声纳探测能力具有重要的意义。通过设计不同测量阵段构建流噪声测量系统,利用实验测量数据研究流噪声空间相关性和流噪声抑制方法。通过研究表明,利用4~20个密排水听器构成水听器组较单个水听器在500Hz以下可提高8 dB^15 dB左右的流噪声抑制能力,同时也可通过柔性的水听器安装结构达到抑制流激振动流噪声效果。Flow noise mainly consists of two kinds of vibration noises induced by flow- excited cable vibration andpressure fluctuation in the turbulence boundary respectively. Current studies show that flow noise is a major factor to restrictthe towed array sonar detection in low- frequency range when the towing speed exceeds a certain value. In this paper, anexperimental system with different measure modules is constructed to study the spatial correlation and noise suppressionmethod of low frequency flow noise. Through the analysis of the experimental data, it is shown that the hydrophone groupconsisting of 4- 20 closely arranged hydrophones can reduce the noise by 8 dB - 15 dB in comparison with a singlehydrophone. It is also shown that the hydrophone with a flexible structure has good flow noise suppression effects.

关 键 词：声学 声纳探测 流噪声 噪声抑制 试验研究 拖曳线列阵声纳 

分 类 号：O422.8[理学—声学]