| 研究生: |
許勝彰 Hsu, Sheng-Chang |
|---|---|
| 論文名稱: |
以同一船模建造不同尺寸船型分析與探討 Build different size ship type analysis and research with the same FRP ship mold |
| 指導教授: |
林忠宏
Lin, Chung-Hung |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 系統及船舶機電工程學系 Department of Systems and Naval Mechatronic Engineering |
| 論文出版年: | 2006 |
| 畢業學年度: | 94 |
| 語文別: | 中文 |
| 論文頁數: | 74 |
| 中文關鍵詞: | 阻力 、船模試驗 |
| 外文關鍵詞: | model test, resistance |
| 相關次數: | 點閱:100 下載:2 |
| 分享至: |
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對於FRP中小型漁船,若想要建造出不同尺寸的船型,大部分的作法,是以原型船模來作加長和加寬的作業方式但不作加深尺寸的船型,但是對於後來加大尺寸的船型,其阻力性能、結構強度這方面的評估資料甚少,而相關研究也相當稀少。
本文是以甲造船廠常見的三種船型,93型、98型、106型製作成船模,以船模實驗跟CFD套裝軟體兩者相互搭配,以船模實驗求出船舶的實際阻力,根據船模實驗結果來驗證Shipflow的可靠性,使以後造船廠要設計新的船型可以使用Shipflow分析,有個參考依據。所得到的結果顯示:在實驗上這三種船型的有效馬力差異性不大,而在使用Shipflow作漁船阻力分析上,其可接受範圍是在Fn=0.3以下,而Fn大於0.3時,實驗跟Shipflow 的趨勢就會產生離異。
另外本文也嘗試在FRP中小型漁船加裝球狀艏,利用加裝球型艏來增加水線下船艏的截面積,使球型艏的部分能夠產生新的波形與原型船的艏波發生有效的干涉效果,而達到減低興波阻力的效用。因此根據文獻原則,設計幾型的球狀艏,探討降低阻力成效,而加裝結果是利用Shipflow分析,對於減阻具有8%的減阻效果。
除了上述阻力分析之外,吾人還探討漁船結構強度。而在甲造船廠對於建造106型的船型,除了在船殼板多加一層Mat、Roving之外,其餘在各部部材的建造方式都不變,導致剖面模數不夠,因此在材料模數這方面作探討之後,發現在加高甲板高度及甲板厚度這兩項工作,對於增加剖面模數最有明顯的效果,以增加結構強度。
As to medium and small-scale FRP fishing boat, the ship type that the shipyard wants to build different size is to do the way change extended and widenning with the ship mold of the prototype. To the ship type after the change, its resistance performance and structure need assessing again.
Three kinds of common ship types in the shipyard: 93, 98, 106 types are made into ship molds . In order to prove that the reliability of CFD software , model tests in resistance were carried on in a towing tank. The effective horse power(EHP) of differences of these three kinds of ship types is similar on the experiment. The resistance of CFD software is analysed that can accept the range to be in fn =Under 0.3.
According to the investigative conclusions on the design of bulbous bows of some published papers. The hull forms of the bows of FPR fishing boats were added.A CFD software was used to estimate the resistance of the ships . It can indeed decrease 8% of the wave-making resistance.
Besides resistance of ships , check out the fishing boat structure. Because it is nearly the same to build the way in these three kinds of ship types. It found that sectional moduluses are not enough. So it should increase the height of the deck and thickness of deck to increase the intensity of structure.
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