南中国海海域存在孤立子内波条件下的声场统计特性  

Sound field statistical characteristics in the South China Sea in the presence of internal solitons

作　　者：张青青 李整林[1] 秦继兴[1] ZHANG Qingqing;LI Zhenglin;QIN Jixing(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：《应用声学》2020年第6期821-830,共10页Journal of Applied Acoustics

基　　金：国家自然科学基金项目(11434012,11874061)。

摘　　要：利用南中国海浅海海域低频声传播起伏实验中获取的水文数据,结合二维平流模型重构出声传播路径上的动态声速场,使用蒙特卡洛方法研究了有无孤立子内波经过时声传播路径上的声传播损失统计特性,并与实验结果进行了对比分析。仿真和实验结果表明:当孤立子内波经过声传播路径时,声传播损失起伏剧烈;与“下发上收”相比,“下发下收”情况下传播损失的概率分布更加分散。The sound speed field on the acoustic propagation path is numerically reconstructed based on the data of a shallow-water experiment conducted in the South China Sea with a two-dimensional advective model.The Monte Carlo method is applied to analyze the statistical characteristics on transmission loss(TL)with the existence of soliton internal waves passing through the acoustic propagation path,and the numerical results are compared with experimental results.Simulation and experimental results are shown that acoustic transmission loss fluctuates more severely when soliton internal waves passing through the acoustic propagation path.When the receiver is located below the thermocline,the probability distributions of TLs are more dispersive than the case that the receiver is located above the thermocline.

关 键 词：孤立子内波 声传播损失 统计特性 浅海 

分 类 号：P733.21[天文地球—物理海洋学]