蔡丁貴臺灣大學:土木工程學研究所陳美蓮Chen, mei-lienmei-lienChen2010-07-012018-07-092010-07-012018-07-092009U0001-1808200917034300http://ntur.lib.ntu.edu.tw//handle/246246/187909本研究選擇以緩坡方程式為基礎,利用緩變因子建立數學控制方程式(任文華,1993;吳明全,1995),再以Galerkin有限元素法建立數值模式用以模擬近岸波浪變形。新控制方程式並納入碎波能量消散項,用來解析近岸波場的折射、反射、繞射及碎波現象。本研究係於緩坡方程式中直接加入能量消散係數模擬,以疊代方式計算碎波帶內波高之變化。和前人之試驗值比較後可發現相關數值計算之結果不僅能合理的解析波場,且在碎波之模擬方面,理論與試驗數據亦呈現合理的一致性。Based on the mild-slope equation, a slowly-varying factor has been introduced to derive a new governing equation (Jen,1993 ; Wu,1995) by Galerkin method of the finite element approach. An item is added to include breaking wave energy dissipation in the governing equation. It is intended to simulate the nearshore wave field with combined refraction, the reflection, the diffraction and the breaking wave phenomenon. Wave transformations with wave-breaking energy dissipation across the surf zone are solved through iterative method. Present numerical result are then compared with experimented measurement (Maruyama, 1984) in a case of offshore beakwater. Reasonable agreement is observed.誌謝 II文摘要 III文摘要 IV一章 序論 1.1研究動機 1.2文獻回顧 1.3研究目的 3二章 數學模式之建立 4.1控制方程式 4.2邊界條件之探討 8三章 數值方法 12.1數值方法 12.2 葛勒金有限元素法 13四章 數值模式驗證 18.1 平行離岸堤計算 18五章 結論與建議 23.1 結論 23.2建議 24803637 bytesapplication/pdfen-US緩坡方程式緩變因子有限元素法the mild-slope equationslowly-varying factorthe finite element approach近岸水域波浪變形數值模擬模式之研究Numerical Modeling of Wave Deformations in the Nearshore Zonethesishttp://ntur.lib.ntu.edu.tw/bitstream/246246/187909/1/ntu-98-R95521324-1.pdf