基于Kraken模型的海洋声场及相干性分析  

Ocean acoustic filed and its coherence analysis based on Kraken model

作　　者：赵闪[1,2] 陈新华[1] 于倍[1,2] 孙长瑜[1] 

机构地区：[1]中国科学院声学研究所,北京100190 [2]中国科学院研究生院,北京100190

出　　处：《海军工程大学学报》2012年第6期32-37,共6页Journal of Naval University of Engineering

基　　金：国家海洋公益性行业科研专项经费资助项目(20100500106)

摘　　要：海洋环境的复杂性和多变性严重影响着水下信号处理系统的性能,海洋声场研究及其相干性分析利于海洋中声纳设备有的布放,为海洋环境的相关场分析和声场的战术运用提供理论依据。射线模型、简正波模型、抛物线等模型分别适合于不同的海洋声场环境,以Kraken简正波模型为基础,完成对不同频率下典型的海洋声场计算与分析,得到不同条件下声场的传播损失图。海洋声场相干性分析侧重于声场水平纵向相干及垂直相干研究,结合其结构产生分别对纵向相干与声源深度及垂直相干与阵元间距等因素的关系展开讨论。研究表明:对不同频率下的声场传播损失的分析及海洋声场的水平纵向相干、垂直相干等问题的探究能够为海洋环境的相关场分析和声场实际应用提供一定参考。The performance of underwater signal processing system is heavily influenced by the complexity and wide variability of the marine environment. Therefore, ocean acoustic filed research and its coherence analysis could be beneficial to the sonar device placed in the ocean and the tactical utilization of the acoustic filed. Ray models, normal mode model, parabolic equation models etc were for different ocean acoustic filed environments. The study of ocean acoustic filed was established on Kraken normal mode model, aiming at the calculating and analyzing of the typical ocean acoustic field in the different frequencies to obtain the image for propagation loss in different conditions. The ocean acoustic filed coherence analysis focuses on the level of acoustic field longitudinal coherence and vertical coherent research. Combined with its structure produced, the factors, such as the depth to level longitudinal coherence and element spacing to vertical coherence were discussed. Studies show that the ocean acoustic filed and its coherence analysis can provide some reference for analyzing the marine environment-related field and applying the acoustic field.

关 键 词：海洋声场 简正波模型 传播损失 相干 

分 类 号：P716.3[天文地球—海洋科学]