Computer Simulation of an Acoustic Tomography System with Application to the Kuroshio in the East China Sea Shelf Edge.

声学层析成像系统的计算机模拟及其在东海陆架边缘黑潮中的应用。

• 批准号: 01540346
• 负责人: KANEKO Arata
• 金额: $ 1.22万
• 依托单位: Inter. Grad. School of Eng. Sci., Kyushu Univ.
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1989
• 资助国家: 日本
• 起止时间: 1989 至 1990
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-01540346/
• 关键词: Ocean acoustic tomography; Underwater sound channel; Kuroshio; Heat transport; Vertical profile; 音響リモ-トセンシング; 海流; 海水温; 鉛直プロファイル; リモ-トセンシング; 数値シミュレ-ション; 海洋密度構造; 東シナ海

The numerical simulation of the ocean acoustic tomography system composed of a paired sound source and receiver located in the underwater sound channel has been carried out using the CTD data collected in the southern Japan Sea. Two kinds of simulations for the different sound fields were done.In the first simulation, the horizontal variation of the sound field was not considered for simplicity. A sound source and receiver were located at the axis of the sound channel of depth 420m with interval 100km. The arrival times for 24 sound rays received were used as data to reconstruct the initial profile of sound speed in the region where the rays crossed over. Agreement between the initial and reconstructed profiles was excellent when the number of the divided horizontal layers was smaller than that of the processed rays.In the second simulation, the sound field with horizontal variation was investigated. Under such a condition, the number of rays propagating between a sound source and receiver located at depth 411m with interval 145km reduced to 8. Although the number of the processed rays had a limitation, the initial profile was successfully reconstructed through a careful selection of good arrival time data.

使用位于水下声通道中的配对声源和接收器组成的海洋声断层扫描系统的数值模拟是使用日本南部海洋收集的CTD数据进行的。进行了两种模拟，对不同的声场进行了模拟。在第一个模拟中，为简单性而没有考虑声场的水平变化。声源和接收器位于深度为100公里的深度420m的声通道的轴上。接收到的24条声音的到达时间用作数据，以重建射线越过的区域中声速的初始曲线。当划分的水平层的数量小于处理后的光线时，初始和重建的轮廓之间的一致性非常好。在第二个模拟中，研究了水平变化的声场。在这样的条件下，射线数量在411m深度的声音源和接收器之间传播，间隔145公里降至8。尽管处理后的射线的数量有限制，但通过仔细选择良好的到达时间数据，成功地重建了初始配置文件。

项目成果

福寿 康人: "海洋音響トモグラフィの数値シミュレ-ションに関する研究" 九州大学大学院工学研究科修士論文. 1-49 (1991)

Yasuto Fukuto：“海洋声层析成像的数值模拟研究”硕士论文，九州大学工学研究科1-49（1991）。

金子 新: "海洋音響チャンネルを利用した海水温分布の計測" 海洋音響学会1991年度研究発表会講演論文集. (1991)

Arata Kaneko：“利用海洋声学通道测量海水温度分布”海洋声学学会 1991 年研究会议论文集（1991 年）。

Yasuto FUKUJU: "A study on numerical simulation of the ocean acoustic tomography system" Master thesis of Grad. School of Eng., Kyushu Univ.1-49 (1991)

Yasuto FUKUJU：“海洋声学层析成像系统数值模拟研究”研究生硕士论文。

Arata KANEKO: "Computer experiment on the acoustic tomography of vertical profiles of sea temperature" Eng. Sci. Rep., Kyushu University. Vol. 12, No. 4. 4 (1991)

Arata KANEKO：“海水温度垂直剖面声学断层扫描计算机实验”Eng。

金子 新: "コンピュ-タを用いた鉛直海水温分布の音響トモグラフィ実験" 九州大学総合理工学研究科報告. 12. (1991)

Arata Kaneko：“利用计算机进行垂直海水温度分布的声学断层扫描实验”九州大学理工学院报告12。（1991）