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研究生:顏守平
研究生(外文):Shou-ping Yen
論文名稱:以三維理論分析穿浪型雙體船在縱波中運動之時程模擬
論文名稱(外文):The time domain motion analysis of the wave piercing catamaran ship in longitudinal wave by three-dimensional theory
指導教授:方銘川方銘川引用關係
指導教授(外文):Ming-chuan Fang
學位類別:碩士
校院名稱:國立成功大學
系所名稱:系統及船舶機電工程學系碩博士班
學門:工程學門
學類:機械工程學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:76
中文關鍵詞:流體動力係數縱搖運動穿浪型雙體船三維脈動型源點
外文關鍵詞:Hydrodynamic coefficientPitch motionWave-piercing catamaran shipThree-dimensional pulsating source
相關次數:
  • 被引用被引用:2
  • 點閱點閱:184
  • 評分評分:
  • 下載下載:40
  • 收藏至我的研究室書目清單書目收藏:0
本文主要是利用三維源點分佈法於時程領域中,來模擬穿浪型雙體船於縱波中之運動。穿浪型雙體船是於一般雙體船中增加一中央船體,當船體在大運動之狀況下,中央船體適時提供一恢復力,以期達到降低雙體船之縱搖運動反應。
文中使用小板法並以三維脈動型源點求解該船於頻率領域下,不同吃水深度之各項流體動力係數,再將求得之各項流體動力係數分別整合成一隨吃水變化之資料庫函數。接著利用四階Runge-Kutta數值解,模擬出該船於時程領域下之起伏與縱搖運動;並將該船之中央船體移除,比較該船有無中央船體之運動,以探討中央船體之實際作用。
In this study, the three-dimensional source distribution method in time domain was used to simulate the motions of the wave-piercing catamaran ship in Longitudinal waves. The wave-piercing catamaran ship is a catamaran ship with a central bow hull body. The central bow hull body can provide extra restoring force and hydrodynamic force to reduce the pitch motion in large waves.
The three-dimensional pulsating source based on panel method is used to calculate the related hydrodynamic coefficients with respect to different drafts in the frequency domain, which can be applied to establish the data base for time domain calculation by 4th Runge-Kutta method. From the comparisons with the conventional catamaran ship, we find that the central bow hull body of wave-piercing catamaran ship works well at some specific wave frequencies, especially while pitch and heave motions are large. Therefore the validity of the central bow hull body of the wave-piercing catamaran ship can be proved.
摘要…………………………………………………………………………………..I
誌謝…………………………………………………………………………………III
目錄…………………………………………………………………………………IV
表目錄…………………………………………………………………………….VII
圖目錄…………………………………………………………………………….. IX
符號說明………………………………………………………………………… XII

第一章 緒論 1
1.1研究背景 1
1.2文獻回顧 2
1.3研究方法 5
第二章 船體運動之數學模型 7
2.1座標系統定義 7
2.2基本假設 8
2.3船體運動之邊界條件與流體動壓力 11
2.4源點分佈法與三維格林函數 12
2.5流體動壓力 14
2.6波浪激盪力 15
2.7附加質量與阻尼係數 16
2.8流體動力之座標系統轉換 16
2.9船體運動方程式-頻率領域 17
2.10船體運動方程式-時程領域 19
第三章 數值方法 20
3.1小板法之應用 20
3.2格林函數之數值計算方法 24
3.3時程領域之解析 25
第四章 船型建立與小板分佈 26
4.1船型尺寸 26
4.2小板建立及分佈 27
4.3不同小板數目對流體動力係數之差異性 33
第五章 結果討論 34
5.1頻率領域之船體運動 34
5.2時程領域之船體運動 35
第六章 結論與未來展望 39
6.1結論 39
6.2未來展望 39
參考文獻 ……………………………………………………………….41
附錄A 流體動力係數資料庫建立 72
附錄B 四階Runge-Kutta數值計算 74
附錄C KW示意圖 76
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