南海北部海域水下偵測音響參數模擬與統計分析研究

Simulation and Statistical Analysis of Underwater Acoustic Detection in the Northern South China Sea

潘冠融(Kuan-Jung Pan)

指導教授 ： 陳琪芳

國立臺灣大學/工學院/工程科學及海洋工程學研究所/碩士(2020年)

https://doi.org/10.6342/NTU202100008

摘要

南海之水下環境非常複雜，使得南海海域具有高度的環境不確定性，因此在此海域進行聲學模擬會有較大的誤差。由於南海具有非常重要的戰略與經濟地位，因此了解此海域的聲納效能是必須也必要的。
本研究為了建立南海大範圍聲學模擬系統，使用海洋模式(Hybrid Coordinate Ocean Model, HYCOM)輸出之聲速剖面，搭配GBM聲學模式(Gaussian Beam Model)建立聲學模擬系統，為了使聲學模擬系統能包含環境不確定性藉此來強化的聲學模擬的準確性，本論文將分為兩大步驟。
第一步藉由2019年的南海聲學實驗所蒐集資料，來量化此聲學模擬系統音傳損耗不確定性的影響，研究結果顯示以海洋模式資料進行聲場預估之音傳損耗不確定性可以使用平均值為-0.86dB、標準差為3.07dB之常態分布表達。第二步將此結果納入大範圍模擬計算中藉此降低由音傳損耗預估誤差，使用大範圍模擬以觀察季變化月變化與日變化，南海之聲納效能在秋季效能最好冬季次之，淺水區較深水區好。
本研究可以預估不同時空變化下之聲納效能，可提供反潛作戰（Anti-submarine Warfare, ASW）決策判斷的依據。

關鍵字

中國南海 ； 水中聲學 ； 聲納效能 ； 模式模擬

並列摘要

The underwater environment of the South China Sea is very complicated, which makes the South China Sea waters have a high degree of environmental uncertainty. Therefore, there will be large errors in acoustic simulation in the South China Sea. Since there has a very important strategic and economic position, it is necessary to understand the sonar performance in this area.
In order to establish a large-scale acoustic simulation system in the South China Sea, this study uses the sound speed profile output by the Hybrid Coordinate Ocean Model and the GBM acoustic mode to establish an acoustic simulation system. Including environmental uncertainty to enhance the accuracy of acoustic simulation, this paper will be divided into two steps.
The first step is to quantify the influence of the uncertainty of the transmission loss of this acoustic simulation system by the South China Sea Acoustics experiment in 2019. The research results show that the uncertainty of the sound transmission loss of the sound field estimation using ocean model data can be expressed in a normal distribution with an average value of -0.86dB and a standard deviation of 3.07dB . The second step is to incorporate this result into a large-scale simulation calculation to reduce the estimated error of transmission loss. Use large-scale simulation to observe seasonal changes, monthly and daily changes. Performances in the South China Sea Sonar is best in autumn and winter is the second-best, The shallow water area is better than the deepwater area.
This thesis estimate the sonar performance under different time and space changes and can provide a basis for decision-making and judgment in anti-submarine warfare (ASW).

並列關鍵字

South China Sea ； Underwater Acoustic ； Sonar Detection Performance ； Modeling Simulation

參考文獻

[1] A. Baggeroer and W. Munk, "The Heard Island feasibility test," Physics Today, vol. 45, no. 9, pp. 22-30, 1992.

[2] B. J. Finn, A. William, and B. Michael, "Computational ocean acoustics," ed: New York: American Institute of Physics, 1994.

[3] 苑梅俊, "淺海水域之水下音傳不確定性分析與偵測效能之研究," 臺灣大學工程科學及海洋工程學研究所學位論文, pp. 1-166, 2007.

[4] 張元櫻, "臺灣東北海域之音傳損耗不確定性研究," 2011.

[5] A. Tolstoy, "3-D propagation issues and models," Journal of Computational Acoustics, vol. 4, no. 03, pp. 243-271, 1996.