臺灣博碩士論文加值系統

　　本文主要計算雙體結構物之非線性流體動力。非線性力主要為橫向漂流力與附加阻力，由船體運動、入射波勢流、繞射波勢流與輻射波勢流等一階物理量所產生。文中根據三維勢流理論基礎，以小板法建立源點網格分布，計算非線性運動採近流場法，並利用座標轉換的方式，加入相位角的概念，分析雙體結構物之非線性力的問題。
　　由於使用相位轉移法，僅需計算對稱結構物座標資料之一半，達到模擬雙體結構物的受力結果，可大幅縮短三維分析計算的時間。數值計算模型包含SWATH6A、SSP、半潛式鑽油平台與NPL雙體船，所得結果並與過去實驗及二維、三維理論解作比較。
　　結果顯示，本文方法可有效改善過去在高頻處產生不合理峰值之現象，尤其在頂浪的情況下，船體間干擾作用後移至船艉時，結構體間受力的互相影響很小。本文應用範圍適用在高速航行下或無速度低干擾型的雙體結構物。

　　The nonlinear hydrodynamic forces on the twin-hull structures are studied in the paper, which include transverse drifting force and added resistance. The hydrodynamic forces are mainly produced by the ship motions, incident wave potential, diffraction wave potential and radiation wave potential. Based on the three-dimensional source distribution method, the author applies the phase transfer technique and near field method to analyze the corresponding nonlinear forces for the twin-hull structures in waves.
　　Because of the application of the phase transfer method, only half data, i.e. monohull configuration, for the twin-hull structure are needed for the calculation and the computation time for the corresponding hydrodynamic data can be saved. The numerical models selected here include SAWATH6A, SSP, semi-submersible platform and NPL catamaran ship. All the results are compared with the two dimensional results and existing experimental data. The results reveal that the present indeed improves some unreasonable peak phenomena in the high frequencies region especially for head waves. The present technique is suitable for the twin – hull moving in high speed or the one with light interaction effect.

中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
圖目錄 V
符號說明 IX
第一章 緒論 1
第二章 基本概念 5
第三章 船體運動 9
　3-1 運動方程式 9
　3-2 黏性阻尼效應與穩定翼效應 9
　3-3 非線性力計算方法 11
　3-4 之數值解 17
第四章 結果與討論 19
第五章 結論與未來展望 56
參考文獻 58
附錄 62
　附錄A 船型主要尺寸表 62
　附錄B 船型網格 63
自述 65

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