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中尺度涡条件下的深海声场效应研究
张 林1, 刘 东1, 陈文景2
1.海军潜艇学院;2.青岛海洋科学与技术试点国家实验室
摘要:
海洋涡旋环境条件下,声波传播会因声速场的变化发生较大差异。文章通过构建中尺度涡的数学模型,利用射线-简正波-抛物方程(RMPE)声学模型进行传播损失计算,进而分析在深海声道、深海会聚区、海底反射三种传播模式下,中尺度涡对深海声效应的影响。数值仿真结果显示,暖涡对深海声道、会聚区产生下压效果,使会聚区水平距离变大,深海声道深度方向上变宽;冷涡使会聚区上抬,距离变短,对声场散射现象明显。研究结果表明,涡旋环境条件下,声场特征会产生显著变化。
关键词:  中尺度涡  传播损失  声学模型  会聚区
DOI:10.11759/hykx20190625002
分类号:P733.21
基金项目:
Study on Deep-sea Acoustic Field effect under the condition of Meso-scale Eddy
ZHANG Lin1, Liu Dong1, CHEN Wenjing2
1.Navy Submarine Academy;2.Pilot National Laboratory for Marine Science and Technology Qingdao
Abstract:
Under the condition of ocean eddy environment, the sound wave transmission will be greatly different due to the change of sound velocity field. In this paper, by constructing the mathematical model of meso-scale eddy, the transmission loss is calculated by using the ray-normal wave-parabola equation (RMPE) acoustic model, and then the influence of meso-scale eddy on the sound effect in deep sea is analyzed under three transmission modes: deep sea channel, deep sea convergence area and seafloor reflection. The numerical simulation results show that the warm eddy has a downward pressure effect on the deep-sea sound channel and convergence area, which increases the horizontal distance of the convergence area and broadens the depth direction of the deep-sea sound channel, and the cold eddy elevates the convergence area and shortens the distance. The phenomenon of scattering to the sound field is obvious. The results show that the characteristics of sound field will change significantly under the condition of eddy environment.
Key words:  Meso-scale eddy  transmission loss  acoustic model  convergence zone
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