Responsive image
博碩士論文 etd-0831110-132908 詳細資訊
Title page for etd-0831110-132908
論文名稱
Title
西子灣海洋實驗場水聲傳播及地聲反算之研究
The Study of Acoustic Propagation and Geoacoustic Inversion in the Sizihwan Bay Marine Test Field
系所名稱
Department
畢業學年期
Year, semester
語文別
Language
學位類別
Degree
頁數
Number of pages
101
研究生
Author
指導教授
Advisor
召集委員
Convenor
口試委員
Advisory Committee
口試日期
Date of Exam
2010-07-23
繳交日期
Date of Submission
2010-08-31
關鍵字
Keywords
西子灣海洋實驗場、傳輸損失、地聲反算、極淺海、SAGA
transmission loss, geoacoustic inversion, SAGA
統計
Statistics
本論文已被瀏覽 5701 次,被下載 18
The thesis/dissertation has been browsed 5701 times, has been downloaded 18 times.
中文摘要
本論文主要的目的在於分析西子灣海洋實驗場聲波傳播的特性,並藉由實驗資料進行地聲反算。現場實驗分別於2009年2月及2010年3月於西子灣海洋實驗場進行,主要儀器設備包括UW350聲源及ITC6050水聽器,發射頻率介於350 Hz與1250 Hz之間。在水聲傳播分析分面,本研究利用OASES聲學軟體進行模式與聲場分析,包括傳輸損失、地形隨距離變化的影響等,並以統計概率的方法探討各種環境參數對於傳輸損失所造成的不確定性,以利瞭解西子灣海洋實驗場的性質。在地聲反算分析部分,首先進行環境參數的敏感度分析,以利評估與選擇反算參數,之後,再使用SAGA軟體,進行參數反算。研究結果顯示,由於西子灣海洋實驗場是一極淺海環境,水深約30 m以內,因此,在發射頻率的範圍內,水聲傳播受到環境邊界性質重大的影響。不確定性分析結果顯示,由於海床沈積層性質取樣有限,量測不易,其對水聲傳播造成較大的不確定性。在反算方面,因水深、底質聲速具高敏感度,因此,反算以高敏感度參數為主,尤其是底質聲速,此亦符合反算作為評估較為不易直接量測參數的方法。本研究結合實驗設計、資料處理、軟體應用、結果分析等,對於西子灣海洋實驗場聲波傳播性質及地聲性質,有了概觀性的瞭解,也提供後續研究的參考。
Abstract
The purpose of the thesis is to analyze the properties of acoustic sound field in the Sizihwan Bay Marine Test Field (SBMTF), and to conduct geoacoustic inversion using the measured data. Two experiments were carried out during February, 2009, and March, 2010. The source was UW350, and the receivers were ITC 6050 hydrophones. The transmitted frequencies lie between 350 Hz and 1250 Hz. On the analysis of acoustic propagation, the study calls for the application of OASES for the analysis of transmission loss and effects of range dependency. Moreover, the uncertainty analysis due to environmental factors was carried out based upon probabilistic approach. For the inversion analysis, the sensitivity of each environmental parameter was first analyzed, and those parameters with high sensitivity were chosen for inversion. Inversion was conducted by the application of SAGA. The results have shown that, due to the fact that the SBMTF is an very shallow water environment with water depth less than 30 m, the acoustic sound field is strongly affected by the boundaries. From the uncertainty analysis, it shows that the transmission loss has high degree of uncertainty resulting from seabed property due to its lack of accurate measurement. The inversion results for water depth and seabed sound speed were obtained, and compared with the measured data. This research calls for experimental design, data processing, software application, and result analysis, offering an overall understanding of the properties of SBMTF that is valuable for future study.
目次 Table of Contents
第一章 緒論 1
1.1 前言 1
1.2 研究背景與動機 2
1.3 文獻回顧 3
1.4 研究方法 4
1.5 論文範疇 5
第二章 基礎原理 7
2.1 拋物線方程式數值模式簡介 7
2.2 機率分布概念 9
2.2.1 目標函數與敏感度指數 9
2.2.2 Monte Carlo 模擬 12
2.3 地聲反算 13
2.3.1 SAGA 簡介 15
2.3.2 基因演算法 16
第三章 實驗設計與執行 19
3.1 西子灣海洋實驗場簡介 19
3.2 2009年2月18日聲傳實驗環境資料 20
3.3 2010年3月15日聲傳實驗環境資料 22
第四章 資料分析 25
4.1 傳輸損失 25
4.2 不確定性分析 32
4.3 敏感度分析 36
4.4 地聲反算測試 38
4.4.1 PE模式分析:水深分段之建構 38
4.4.2 環境與SAGA 參數設定 40
4.4.3 參數搜尋範圍 42
4.4.4 反算結果:SAGA測試 44
4.4.5 水深測試 45
4.4.6 聲源深度測試 51
4.4.7 接收器深度測試 56
4.5 反算結果:實測資料
第五張 結論與建議 66
5.1 結論 66
5.2 建議 67
附錄 70
參考文獻 References
[1] 劉金源,《水中聲學─水聲系統之基本操作原理》,國立編譯館,民90。
[2] 劉金源,《海洋聲學導論~─~海洋聲波傳播與粗糙面散射之基本原理》,中山大學出版社,民91。
[3] 許登壹,《西子灣海洋實驗場環境調查之分析》,國立中山大學海下技術研究所碩士論文,民96。
[4] 趙尊憲,《高雄港第一港口水下噪音特性之研究》,國立中山大學海下技術研究所碩士論文,民96。
[5] Schmidt, Henrik, "SAFARI: Seismo-Acoustic Fast Field Algorithm for Range Independent Environments, User's Guide," SR113, SACLANT ASW Research Centre, La Spezia(1985).
[6] C.F.Huang, and W. Hodgkiss, "Matched-Field Geoacoustic Inversion of Low-Frequency Source Tow Data Rrom the ASIAEX East China Sea Experiment," IEEE J. Ocean. Eng., No.4(2004).
[7] P. Neumann, and G. Muncill, ``Using the adaptive simulated annealing algorithm to estimate ocean-bottom geoacoustic properties from measured and synthetic transmission loss data,” IEEE J. Ocean. Eng., Vol. 29, No. 1, pp. 13-28 (2004).
[8] 楊士鋒,《以非均質海床地聲模式反算沉積層聲速剖面問題之研究》,國立中山大學海下技術研究所碩士論文,民96。
[9] 郭耀先,《利用船舶噪音於ASIAEX南海實驗中之地聲參數反算》,國立中山大學海下技術研究所碩士論文,民94。
[10] B.P. Lathi, "Signal Processing and Linear Systems," OXFORD, 9th edition.
[11] P. Gertoft, SAGA User Manual 5.4:An inversion software package, Marine Physical Laboratory, Scripps Institution of Oceanography , University of California at San Diego,(2007).
[12] C. F. Huang, P. Gertoft, and W. S. Hodgkiss, "Validation of statistical estimation of transmission loss in the presence of geoacoustic inversion uncertainty," J. Acoust. Soc. Am., 120, pp. 1932-1941(2006).
[13] C. F. Huang, P. Gertoft, and W. S. Hodgkiss, "Uncertainty analysis in matched-field geoacoustic inversions," J. Acoust. Soc. Am., 119, pp. 197-207(2006).
[14] 蕭名亨,《西子灣極淺海域水聲傳播實驗》,國立中山大學海下技術暨應用海洋物理研究所碩士論文,民98。
[15] F.B. Jensen, W.A. Kuperman, M.B. Poter, and H. Schmidt,Computational Ocean Acoustics, AIP Press(1994).
[16] M. D. Collins and E. K. Westwood,"A higher-order energy-conserving parabolic equation for range-dependent ocean depth, sound speed, and density," J. Acoust. Soc. Am., 89, pp. 1068-1075(1991).
[17] A. P. Rosenberg, "A new rough surface parabolic equation program for computing low-frequency acoustic forward scattering from the ocean surface," J. Acoust. Soc. Am. , 105, pp. 144-153(1999).
[18] R. T. Bachman, "Acoustic and physical property relationships in marine sediments," J. Acoust. Soc. Am. , 78, pp. 616-621(1985).
[19] Edwin L. Hamilton, "Geoacoustic modeling of the sea floor," J. Acoust. Soc. Am. , 68, pp. 1313-1340(1980).
[20] C. F. Huang, P. Gertoft, and W. S. Hodgkiss, "Effect of ocean sound uncertainty on match-field geoacoustic inversion," J. Acoust. Soc. Am., 123, 2008.
[21] R. R. Greene , "The rational approximation to the acoustic wave equation with bottom interaction," J. Acoust. Soc. Am., 76, 1984.
[22] F. A. Bowles , "Observations on attenuation and shear-wave velocity in fine-grained, marine sediments,"J. Acoust. Soc. Am., 101(6), 1997.
電子全文 Fulltext
本電子全文僅授權使用者為學術研究之目的,進行個人非營利性質之檢索、閱讀、列印。請遵守中華民國著作權法之相關規定,切勿任意重製、散佈、改作、轉貼、播送,以免觸法。
論文使用權限 Thesis access permission:校內公開,校外永不公開 restricted
開放時間 Available:
校內 Campus: 已公開 available
校外 Off-campus:永不公開 not available

您的 IP(校外) 位址是 35.168.113.248
論文開放下載的時間是 校外不公開

Your IP address is 35.168.113.248
This thesis will be available to you on Indicate off-campus access is not available.

紙本論文 Printed copies
紙本論文的公開資訊在102學年度以後相對較為完整。如果需要查詢101學年度以前的紙本論文公開資訊,請聯繫圖資處紙本論文服務櫃台。如有不便之處敬請見諒。
開放時間 available 已公開 available

QR Code