深海直达声区中大深度声场水平纵向相关特性  

Horizontal-longitudinal Correlations of Sound Field at Large Depth in the Direct Zone of Deep Water

作　　者：王梦圆[1,2] 李整林 秦继兴[1] 吴双林[1,2] 王光旭 WANG Mengyuan;LI Zhenglin;QIN Jixing;WU Shuanglin;WANG Guangxu(State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China;University of Chinese Academy of Sciences, Beijing 100049, China)

机构地区：[1]中国科学院声学研究所声场声信息国家重点实验室,北京100190 [2]中国科学院大学,北京100049

出　　处：《兵工学报》2021年第4期817-826,共10页Acta Armamentarii

基　　金：国家自然科学基金项目(11874061、11674349)。

摘　　要：深海直达声区中大深度声场水平纵向相关特性对海底水平阵阵形设计和相应的信号处理技术具有重要参考意义。基于2016年南海冬季一次深海不完全声道声传播实验,分析大深度声场特性及水平纵向相关性,对深海直达声区中大深度声场水平纵向相关性进行理论研究和数值仿真。结果表明:大深度声场的水平纵向相关半径与声能量高低无关,直达声区中大深度声场的干涉特性导致声场水平纵向相关系数存在振荡结构,声场水平纵向相关半径与声场传播损失的振荡周期一致,振荡周期越大,水平纵向相关半径越大;直达声区中声场水平纵向相关半径的大小随声源频率和声源深度的增大而变小,直达声区中近距离处声场水平纵向相关半径受接收深度变化影响较小,但在远距离处随接收深度的增大而增大。The horizontal-longitudinal correlations of sound field at large depth in the direct zone of deep water have important reference significance for the design of horizontal array and the signal processing of array.The characteristics of deep water sound transmission loss and horizontal-longitudinal correlations are analyzed based on a deep water incomplete channel sound transmission experiment in the South China Sea in the winter of 2016.The horizontal-longitudinal correlations in deep water of the direct zone are analyzed through theory and simulation.The results show that the horizontal and longitudinal correlation radii of sound field at large depth are independent to the sound energy.The interference characteristics of sound field at large depth in deep water of the direct zone lead to the existence of oscillation structure of horizontal-longitudinal correlation coefficient.The horizontal-longitudinal correlation radius of sound field is consistent with the oscillation period of sound transmission losses.The longer the oscillation period is,the larger the horizontal-longitudinal correlation radius is.The horizontal-longitudinal correlation radius decreases with the increase in the frequency and depth of sound source in the direct zone.The horizontal-longitudinal correlation radius of sound field at the near distance from direct zone is less affected by the change of receiver depth,but it increases with the receiver depth at a far distance.

关 键 词：大深度声场 深海直达声区 水平纵向相关特性 振荡结构 

分 类 号：TB566[交通运输工程—水声工程]