臺灣博碩士論文加值系統

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 考慮穩定週期運動，線性波浪場、剛體浮式結構物、以及懸垂繫纜。波浪場中的繞射波和輻射波僅使用一個反應波表示，同時波浪場為利用邊界元素法模擬。浮式結構物為具有六個自由度運動。懸垂繫纜則使用有限元素法模擬。在問題求解上則先利用繫留點力與位移連續的條件，將纜繩運動方程式與結構物運動方程式合併，然後再與波浪場邊界元素模式聯立求解整個問題。對於本文建立起來的波浪與繫纜浮式結構物互相作用三維數值模式，首先說明數值網格計算的收斂性。接著模擬斷面水槽中繫纜浮式矩形立方體受波浪作用的問題，計算結果除與Sannasiraj et al. (1998)的數值與試驗結果比較說明本研究的正確性外，同時也探討模擬二維結果時，斷面水槽三維數值模擬參數的設定。最後，利用本文所發展數值模式探討繫纜浮體在開闊海洋中受波浪之運動特性，結果包括不同波浪入射方向作用下之波浪場、結構物各自由度之運動、以及繫纜之受力。
 In this study a three-dimensional problem of interactions between waves and a floating structure with moorings is investigated. The problem considered is steady and periodic, and linear wave field, rigid floating structure, and catenary moorings are adopted. For the wave problem the diffracted wave and radiated wave are represented as one induced wave. The wave field is simulated using a boundary element method. The floating structure has six degrees of freedom. The catenary moorings are represented by a finite element model. In the solution the equations of the floating structure and the catenary cable are combined firstly through continuous connections of force and displacement. Then the entire problem is solved using structural equations together with the boundary element wave model. Using the three-dimensional numerical model of wave interaction with a moored floating structure developed in this study, the convergence calculation of numerical mesh is firstly illustrated. In what follows, a floating rectangular cuboid in the channel subjected to incident wave is simulated. The present numerical results are compared with numerical and experimental results by Sannasiraj et al. (1998) to demonstrate accuracy of the present model. Meanwhile the parameters used in three-dimensional simulations in the wave channel to simulate two-dimensional results are also investigated. Finally, the problems of a moored floating rectangular structure in the open sea subjected to incident waves of various directions are investigated. The simulated results include wave fields, structural motions of each degrees of freedom, and mooring forces
 中文摘要 IAbstract II誌謝 V目錄 VI表目錄 VIII圖目錄 IX符號說明 XIII第一章 緒論 1-11-1 前言 1-11-2 文獻回顧 1-21-3 研究目的與方法 1-51-4 組織與架構 1-6第二章 問題描述 2-12-1波浪場邊界值問題 2-22-2三維波浪場邊界元素之模擬 2-42-3三維纜繩有限元素之模擬 2-62-4在無波浪作用下三維繫纜浮式結構物靜態平衡位置之計算 2-10第三章 數值模式 3-13-1三維繫纜浮式結構物與波浪互制數值模式 3-13-2在斷面水槽中繫纜錨錠浮體與波浪互制數值模式 3-63-3在斷面水槽中彈簧錨碇浮體與波浪互制數值模式 3-93-4自由浮體與波浪互制模式及纜繩數值模式之元素收斂計算 3-13第四章 結果與討論 4-14-1在斷面水槽中繫纜錨錠浮體與波浪互制模式之計算結果 4-14-2在斷面水槽中彈簧錨碇浮體與波浪互制模式之計算結果 4-74-3在開闊海洋中繫纜錨錠浮體與波浪互制之計算結果 4-13第五章 結論與建議 5-15-1 結論 5-15-2 建議 5-2參考文獻 6-1附錄A結構物邊界條件推導 A-1附錄B三維邊界元素法 B-1附錄C三維懸垂方程式推導 C-1附錄D三維繫纜浮式結構物運動方程式 D-1附錄E繫纜與浮式結構物運動方程式合併推導 E-1附錄F線性代數式中常數C之推導 F-1
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 1 浮體結構物運動模式及消波特性之研究 2 單一繫纜海域浮台之研究 3 波浪與浮式結構物互相作用之理論解析 4 波浪通過潛式透水結構之三維計算 5 繫纜浮式結構物和波浪互相作用之數值計算

 1 50.陳伯義、李兆芳、洪偉勝，波浪與浮式結構物互相作用之理論解析，海洋工程學刊，第6卷，第2期，第63-80頁，2006。 2 50.陳伯義、李兆芳、洪偉勝，波浪與浮式結構物互相作用之理論解析，海洋工程學刊，第6卷，第2期，第63-80頁，2006。

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