臺灣博碩士論文加值系統

由於臺灣位處亞熱帶地區，海水聲速較高，因此在臺灣周邊海域實施反潛偵搜作為的水面艦艇，其反潛聲納能量的傳遞將很難避免與海底底質接觸，因此除了影響聲波反彈路徑的海底地形之外，影響聲波反彈能量的海底底質聲學性質，也是左右聲納偵測效能(sonar detection performance)的一項重要因子。預估聲納效能需要聲速(Sound Speed)、有效密度(Effective Density)及吸收(Attenuation)等聲學性質，而這些聲學性質的預估與取得，則是本研究的主要目的。本文提出以雙載台海上音傳實驗場景為基礎，藉NTURAY處理深海大角度一次海底反彈的聲納回波，計算相關聲線路徑弧長、海底入射角等幾何性質，並估計底質損失，再利用Biot Theory探討某入射角下的底質損失，反推欲求之底質聲學參數。藉由本研究方法可估算海底反彈點的底質聲學參數供聲納偵測效能預估之用，另外對雙艦艇音傳實驗資料的運用，亦可產生效益最大化的效果。

Due to locating in subtropical zone with high-speed sea water sound velocity, Taiwan Navy fleet’s sonar energy can not avoid to contact with sea bottom for ASW purpose. Seabed topography affects the reflection of sound rays, and sediment acoustic parameters affect reflected energy as well. To predict sonar performance, sediment acoustic parameters, such as sound speed, effective density and attenuation, are necessaries. Estimating these parameters is the main purpose of this thesis. Base on two-ship acoustic experiment, use NTURAY to calculate sound rays geometry properties, such as ray path arc length and incident angle, and estimate bottom loss in deep ocean one-bottom-bounce scenario. Then inverse sediment acoustic parameters from incident angle and bottom loss via Biot Theory. This method can estimate sediment acoustic parameters of bottom bounce spot for sonar performance prediction, and maximize data applications of two-boat sound transmission experiment.

論文審定書 i
謝 誌 iii
摘 要 iv
Abstract v
目錄 vi
圖次 viii
表次 xii
第一章 緒論 1
1.1 研究背景與動機 1
1.2 文獻回顧 3
1.3 研究目標 4
1.4 貢獻 5
第二章 研究步驟與理論方法 6
2.1 理論基礎 7
2.2 NTURAY 9
2.3 海水的吸收(Absorption) 10
2.4 反射係數(Reflection Coefficient)與底質損失(Bottom Loss) 11
2.5 Biot Theory 14
2.6 小結 25
第三章 底質參數反算 27
3.1 理論驗證 27
3.2 量測實驗 36
3.3 反算過程 38
3.3.1 A測線第一趟 38
3.3.2 A測線第二趟 41
3.3.3 A測線第三趟 45
3.3.4 B測線第一趟 49
3.3.5 B測線第二趟 53
3.3.6 C測線第一趟 57
3.3.7 C測線第二趟 61
3.3.8 C測線第三趟 65
3.4 反算結果 69
3.4.1 測線A 69
3.4.2 測線B 70
3.4.3 測線C 70
第四章 反算誤差分析 72
4.1 誤差原因探討 72
4.2 誤差分析 72
4.2.1 水文變動對NTURAY幾何計算之影響探討 72
4.2.2 水文變動對Biot Theory反算之影響探討 78
4.3 小結 81
第五章 結論 82
參考文獻 90

[1]Michael B. Porter, Homer P. Bucker. 「Gaussian beam tracing for computing ocean acoustic fields.」J. Acoust. Soc. Amer., vol. 82, 1987, pp. 1349-1359.
[2]M. A. Biot,「Mechanics of deformation and acoustic propagation in porous media.」 J. Appl. Phys., vol. 33,1962, pp. 1482-1498.
[3]R. D. Stoll and T. K. Kan, 「Reflection of acoustic waves at a water-sediment interface.」J. Acoust. Soc. Amer., vol. 70,1981, pp. 149-156.
[4]M. A. Biot,「Theory of propagation of elastic in a fluid-saturated porous solid. II Higher frequency range.」J. Acoust. Soc. Amer., vol. 28, 1956, pp. 168-178.
[5]M.D. Richardson, K. B. Briggs, L. D. Bibee, P. A. Jumars, W. B. Sawyer, D. B. Albert, R. H. Bennett, T. K. Berger, M. J. Buckingham, N. P. Chotirs, P. H. Dahl, N. T. Dewitt, P. Fleischer, R. Flood, C. F. Greenlaw, D. V. Holliday, M. H. Hulbert, M. P. Hutnak, P. D. Jackson, J. S. Jaffe, H. P. Johnson, D. L. Lavoie, A. P. Lyons, C. S. Martens, D. E. McGehee, K. D. Moore, T. H. Orsi, J. N. Piper, R. I. Ray, A. H. Reed, R. F. L. Self, J. L. Schmidt, S. G. Schock, F. Simonet, R. D. Stoll, D. Tang, D. E. Thistle, E. I. Thorsos, D. J. Walter, and R. A. Wheatcroft, 「An overview of SAX99：Environmental considerations.」IEEE J. Ocean. Eng., vol. 26, 2001, pp. 26-53.
[6]M. D. Richardson, K. L. Williams, K. B. Briggs, and E. I. Thorsos, 「Dynamic measurement of sand grain compressibility at atmospheric pressure：Acoustic applications.」IEEE J. Ocean. Eng., vol. 27, 2002, pp. 593-601.
[7]S. G. Schock 「A method for estimating the physical and acoustic properties of the sea bed using chirp sonar」IEEE J. Ocean. Eng., vol. 29, 2004, pp.1200-1217.
[8]R. T. Bachman, 「Acoustic and physical property relationships in marine sediments」J. Acoust. Soc. Amer, vol. 78, 1985, pp. 616-621.
[9]K. L.Williams, D. R. Jackson, E. I. Thorsos, D. Tang, and S. G. Schock, 「Comparison of sound speed and attenuation measured in a sandy sediment to predictions based on the Biot theory of porous media」 IEEE J.Oceanic Eng., vol. 27, July 2002 , pp. 413–428.
[10]T. Yamamoto, M. V. Trevorrow, M. Badiey, and A. Turgut, 「Determination of the seabed porosity and shear modulus profiles using a gravity wave inversion」 Geophys. J. Int., vol. 98, 1989. , pp. 173–182
[11]R. Stoll, 「Acoustic waves in ocean sediments」 Geophys., vol. 42, no. 4, pp. 715–725, 1977.
[12]P. R. Ogushwitz,「Applicability of the Biot theory. I. Low-porosity materials」 J. Acoust. Soc. Amer., vol. 77, no. 2, pp. 429–440, 1985.
[13]Dmitry Chizhik, J. Matthew Tatersall, 「Application of Biot Theory to the Study of Acoustic Reflection from Sediments」 NUWC-NL Technical Report, September 1992.
[14]E. L. Hamilton, 「Reflection coefficients and bottom losses at normal incidence from Pacific sediment properties」Geophys., vol. 35, no. 6, pp. 995–1004, 1970.
[15]N. P. Chotiros,「Biot model of sound propagation in water-saturated sediment」J. Acoust. Soc. Amer., vol. 97, 1995, pp. 199-214.
[16]M. A. Biot, 「Theory of propagation of elastic waves in a fluid-saturated porous solid. II. Higher frequency range」 J. Acoust. Soc. Amer., vol 28, 1956, pp. 179-191.
[17]T. Yamamoto and A. Turgut,「Acoustic wave propagation through a porous media with arbitrary pore size distributions」 J. Acoust. Soc.Amer., vol. 83, 1988, pp. 1744-1751.
[18]M. Richardson et al.,「Overview of SAX-99: Environmental considerations」IEEE J. Oceanic Eng., Jan. 2001.
[19]S. G. Schock,「Remote sediment estimates of physical and acoustic properties in the South China Sea using chirp sonar data and the Biot model」, IEEE J. Oceanic Eng., Oct. vol. 29, no. 4, 2004, pp. 1218-1230.
[20]M. A. Biot,「Theory of propagation of elastic waves in a fluid-saturated porous solid. I. Low frequency range」J. Acoust. Soc. Amer., vol., 28, no. 2, 1956.
[21]A. P. Lyons, J. Osler, and N. G. Pace, 「Normal incidence reflection loss from a sandy sediment」 J. Acoust. Soc. Amer., vol. 112, no. 5, pp. 1831–1841, 2002.
[22]N. P. Chotiros,「Response to: Comments on ‘Biot model of sound propagation in water saturated sand」 J. Acoust. Soc. Amer., vol. 103, 1998, pp. 2726-2729.
[23]A. Turgut and T. Yamamoto,「Measurement of acoustic wave velocities and attenuation in marine sediments」 J. Acoust. Soc. Amer.,vol. 87, 1990, pp.2376-2383.
[24]A. Maguer, E. Bovio, and W. L. J. Fox,「In situ estimation of sediment sound speed and critical angle」J. Acoust. Soc. Amer., vol. 108, 2000, pp. 987-996.
[25]N. P. Chotiros,「Inversion of sandy ocean sediments」 in Full Field Inversion Methods in Ocean and Seismo-Acoustics, O. Diachok, A. Caiti, P. Gerstoft, and H. Schmidt, Eds. Dordrecht, The Netherlands: Kluwer, Geophys., vol. 12, pp.353–358, 1995.
[26]E. I. Thorsos, K. L.Williams, N. P. Chotiros, J. T. Christoff, K.W. Commander,C. F. Greenlaw, D. V. Holliday, D. R. Jackson, J. L. Lopes, D.E. McGehee, M. D. Richardson, J. E. Piper, and D. Tang,「An overview of SAX99: Acoustic measurements」IEEE J. Ocean. Eng., Jan. vol. 26, 2001, pp. 4-25.
[27]K. L. Williams,「An effective density fluid model for acoustic propagation in sediments derived from Biot theory」J. Acoust. Soc. Amer., vol. 110, 2001, pp. 2276-2281.
[28]R. D. Stoll,「Acoustic waves in saturated sediments」 in Physics of Sound in Marine Sediments, L. Hampton, Ed. New York: Plenum Press, 1974, pp. 19-39.
[29]A.W. Nolle,W. A. Hoyer, J. F. Mifsud,W. R. Runyan, and M. B.Ward,「Acoustic properties of water-filled sand」J. Acoust. Soc. Amer.,vol. 35, 1963, pp. 1394-1408.
[30]L. D. Hampton,「Acoustic properties of sediments」 J. Acoust. Soc. Amer.,vol. 42, 1967, pp. 882-894.
[31]A. C. Kibblewhite,「Attenuation of sound in marine sediments:A review with emphasis on the new low frequency data」 J. Acoust. Soc. Amer., vol. 86, 1989, pp. 716-738.
[32]Paul A. Baxley and Homer Bucker, 「Comparison of Beam Tracing Algorithms.」 Proceedings of the Fifth European Conference on Underwater Acoustics, ECUA 2000., 2000.
[33]Martin Siderius and Michael B. Porter, 「Modeling broadband ocean acoustic transmissions with time-varying sea surfaces.」 J. Acoust. Soc. Amer.,vol. 124, 2008, pp. 137-150.
[34]Chanchal De and Bishwajit Chakraborty, 「Model-Based Acoustic Remote Sensing of Seafloor Characteristics」, IEEE, vol. 49, 2011, pp. 3868-3877.
[35]F.B. Hildebrand,「Advanced Calculus for Applications」, Prentice-Hall, Englewood Cliffs, NT, pp.306-311, 1976.
[36]Yong-Min Jiang and N. Ross Chapman, 「Measurement of Low-Frequency Sound Attenuation in Marine Sediment」, IEEE, vol. 35, 2010, pp. 70-78.
[37]Linus Y.S Chiu, Andrea Chang, Ying-Tsong Lin, Arthur Newhall, and Char-Shine Liu,「Estimates of Physical/Acoustic Sediment Properties in the Region of North Mein-Hua Canyon Using Chirp Sonar Data, Biot Model and Objective Mapping.」, In Press.
[38]Chang, Yuan-Ying;Lin, Ying-Tsong; Chen, Chi-Fang; Hwang, Wei-Shien, 「Using Gaussian Beam Model in Oceans with Penetrating Slope Bottoms」, The 7th International Conference of Theoretical and Computational Acoustics 2005, Hangzhou, 19-22 Sept. 2005.
[39]Yuan-Ying Chang, Cheng-Ken Huang, Chi-Fang Chen*,Sen Jan, “Study Of Transmission Loss Of Variation Affected By Internal Tides In The Sea Area Northeast Of TAIWAN”, JCA, August 1, 2011-08-01 (SCI 2012)
[40]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」, 國立臺灣大學工程科學及海洋工程學研究所博士論文, 2007年.