水下噪声源的声成像研究  

Acoustic Image of Underwater Noise Sources System

作　　者：杨德森[1] 谢长生 

机构地区：[1]哈尔滨船舶工程学院水声研究所

出　　处：《哈尔滨船舶工程学院学报》1992年第3期298-303,共6页

摘　　要：水下声成像技术是研究水下声源及其性质的有力工具.本文利用声波互强度的传播规律,通过声场的空间变换获得水下声源的声像.文中利用 FFT 算法计算 Fresnel 积分,并以一个长度和宽度均为2d=23cm 的五元十字阵水下发射系统为例,给出了该系统在水下2m 深时的声像.文中还对声成像过程中声学测量的参数选择做了说明.Nearfield acoustic image has been proved to be a useful tool for studying characteris.tics of underwater sound sources.In this paper,an image method is proposed by the aid of the propagation law of mutual intensity and a method for calculating Frcsnel integration by the aid of FFT is also introduced.As an actual instance,the paper shows a sound image of five-element cross array.This array is 2d=23 centimetres in both length and width and is 2 meters deep.Another problem discussed in this paper is how to decide the parameters for getting a clear image in the procedure of underwater acoustic measurements.

关 键 词：声成像 噪声源 

分 类 号：O427.5[理学—声学]