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研究生:温閏植
研究生(外文):Jen-Chih Wen
論文名稱:利用表面聲源與Biot Theory於深海海域反算海底底質地音參數之研究
論文名稱(外文):The Inversion for Sediment Acoustic Parameters Using Surface Sound Source with Biot Theory in Deep Sea Area.
指導教授:邱永盛邱永盛引用關係
指導教授(外文):Linus Y.S. Chiu
學位類別:碩士
校院名稱:國立中山大學
系所名稱:海下科技暨應用海洋物理研究所
學門:工程學門
學類:電資工程學類
論文種類:學術論文
論文出版年:2013
畢業學年度:102
語文別:中文
論文頁數:107
中文關鍵詞:底質損失聲納偵測效能底質參數海底反彈
外文關鍵詞:bottom bouncebottom lossNTURAYBiot Theorysonar detection performancesediment acoustic parameter
相關次數:
  • 被引用被引用:4
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  • 下載下載:29
  • 收藏至我的研究室書目清單書目收藏:0
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
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