Page 27 - 《应用声学》2020年第6期

第 39 卷 第 6 期 Vol. 39, No. 6
2020 年 11 月 Journal of Applied Acoustics November, 2020

⋄ 研究报告 ⋄

南中国海海域存在孤立子内波条件下的

声场统计特性 ∗

张青青 1,2 李整林 1† 秦继兴 1

(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)

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。
关键词：孤立子内波；声传播损失；统计特性；浅海
中图法分类号: P733.21 文献标识码: A 文章编号: 1000-310X(2020)06-0821-10
DOI: 10.11684/j.issn.1000-310X.2020.06.004

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

ZHANG Qingqing 1,2 LI Zhenglin 1 QIN Jixing 1

(1 State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China)
(2 University of Chinese Academy of Sciences, Beijing 100049, China)

Abstract: 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.
Keywords: Soliton internal waves; Transmission loss; Statistical characteristics; Shallow water

2020-03-20 收稿；2020-07-15 定稿
国家自然科学基金项目 (11434012, 11874061)
∗
作者简介: 张青青 (1991– ), 男, 甘肃静宁人, 博士研究生, 研究方向: 内波对声场的影响。
通信作者 E-mail: lzhl@mail.ioa.ac.cn
†