基于可靠声路径的深海声场垂直相关性研究  

Research on the vertical correlation of acoustic field in deep water based on reliable acoustic paths

作　　者：邱春燏 陈羽[1] 马树青[1] 孟洲[1] QIU Chun-yu;CHEN Yu;MA Shu-qing;MENG Zhou(College of Meteorology and Oceanology,National University of Defense Technology,Changsha 410005,Hunan,China)

机构地区：[1]国防科技大学气象海洋学院

出　　处：《声学技术》2019年第3期270-277,共8页Technical Acoustics

基　　金：国防科技大学校科研重点基金项目(ZDYYJCY J20140701);国防科技大学校科研基金项目(ZK16-03-56,ZK16-03-31)

摘　　要：可靠声路径(Reliable Acoustic Path,RAP)是深海中的一种重要声信道,在总结可靠声路径物理机理及探测优势的基础上,采用射线模型分析了RAP声信道内水听器接收声线的结构特性,计算了32基元垂直线列阵接收信号的相关性随声源距离的变化,仿真结果显示在中程探测距离内信号垂直相关性将出现衰落。结合这一现象深入探究了多途效应对声场垂直相关性的影响,揭示了多途传播中能量较强的波在不同基元上的到达时间差是影响垂直相关性的最主要因素,最后利用以上分析对RAP声信道内垂直阵列的布放、设计及增益分析提出了建议。The reliable acoustic path (RAP) is an important acoustic channel in deep water. Based on the physical mechanism of RAP and its advantages in detection, the structures of the acoustic rays received in RAP are analyzed by using ray theory. For a 32-element vertical linear array, the variation of the cross-correlations of the received signals with the source range are simulated, and the result shows that a sudden decline of the cross-correlation appears in medium detection range. Based on this phenomenon, the influence of multipath effect on the vertical correlation is studied. It indicates that the time deviation of the acoustic rays with higher amplitude arriving different elements is the main factor to affect the vertical correlation. Finally, some suggestions on the deployment, design and gain analysis of the vertical array in RAP are put forward.

关 键 词：垂直相关性 可靠声路径 射线理论 深海 

分 类 号：TN911.7[电子电信—通信与信息系统]