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研究生:林育鴻
研究生(外文):Yu-Hung Lin
論文名稱:離岸風機新穎桁架式支撐結構之設計分析與驗證
論文名稱(外文):Novel Jacket Structure of Offshore Wind Turbines: Design, Analysis, and Experiment
指導教授:林輝政林輝政引用關係
指導教授(外文):Huei-Jeng Lin
口試委員:宋家驥江茂雄
口試委員(外文):Chia-Chi SungMao-Hsiung Jiang
口試日期:2015-06-30
學位類別:碩士
校院名稱:國立臺灣大學
系所名稱:工程科學及海洋工程學研究所
學門:工程學門
學類:綜合工程學類
論文種類:學術論文
論文出版年:2015
畢業學年度:103
語文別:中文
論文頁數:139
中文關鍵詞:離岸風力發電機塔架桁架式支撐結構ABAQUS有限元素分析挫曲分析
外文關鍵詞:Offshore Wind Turbine TowerJacket StructureABAQUSFinite Element AnalysisBuckle Analysis
相關次數:
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離岸風力發電塔架的支撐結構分為數種,主要依據水深以及海床土壤狀況而定,目前全世界風力發電的需求量不斷提升,所以越來越多離岸風力發電塔架也往更深的海域發展。目前較多的離岸風力發電都集中在水深25-50公尺之間,主要的支撐結構以單樁式為主,但是很多國家已經開始針對桁架式支撐結構進行研究與建設,故本研究的目的是希望針對台灣離岸風況還有海況去對5MW桁架式支撐結構進行設計、分析和驗證,希望可以藉此改善並提升台灣離岸風力發電的效率。
本研究參考了很多桁架式支撐結構相關的文獻後,針對目前現有的桁架式支撐結構進行改良,並自行設計出新型的三腳桁架式支撐結構。本文一共設計了14種支撐結構模型,這些模型的建構是使用SOLIDWORK工程繪圖軟體。而數值模擬分析的部分則是使用ABAQUS有限元素分析軟體。本文的數值模擬是針對建構出來的支撐結構模型進行梁元素分析,薄殼元素分析以及挫曲分析。
實驗部分是利用拉伸試驗機對縮小尺寸的試體進行載荷-位移曲線的量測,一共有2部分的實驗,第1部分是進行實心結構的挫曲實驗,試體的部分是採用自行設計出的新型三腳桁架式支撐結構。第2部分是進行空心結構的挫曲實驗,試體部分是採用圓柱狀空心鋼管結構。最後再將這2個實驗結果與數值模擬進行比對,驗證模擬數據的準確性。
由梁元素與薄殼元素分析的結果可看出本文自行設計出來的0°新型三腳桁架式支撐結構在相同負載狀況下會比其他桁架式支撐結構承受較小的應力,而挫曲分析的結果則顯示90°新型三腳桁架式支撐結構是4種新型三腳桁架式支撐結構中最好的。另外,從模型設計的角度上來探討,新型三腳桁架式支撐結構的桿件數量以及焊接點數量都是遠低於現在普遍使用的傳統四腳桁架式支撐結構,這可以減少施工上的麻煩也可以剩下不少的建構成本。


There are several types of support structure in offshore wind turbine tower. How to choose them depends on water depth and soil situation of sea bed. Nowadays the demand of wind energy is increasing, so the development of offshore wind turbine has further expanded to deeper water depth region. Large fraction of wind turbine towers is built on the sea bed where the water depth ranges from 25 to 50 meter. Although most of the wind turbine tower structures in the world are monopole supported, many countries start to research on jacket structure. The purpose of present study is to design and analyses the most suitable support structure for 5MW offshore wind turbines in Taiwan.
Based on reviewed literature, different types of general jacket structures model are built. New types of jacket structures are successfully designed, known as modified tripod jacket structures. In this thesis, 14 types of jacket structures models have been constructed using SOLIDWORK design software. The finite element analysis (Beam Element Analysis and Shell Element Analysis) and buckle analysis are performed using ABAQUS/CAE package software.
In the experiment, MTS machine is used to perform the buckle test on small-scaled specimens. The experiments are conducted in two stages, first is to execute buckle test on the modified tripod solid structure. Second is to execute buckle test on steel hollow tube. The force-displacement data is measured and compared with the simulation results to evaluate the validity of the numerical method.
CAE result shows that, 0°modified tripod jacket structure has better behavior under stress loading. In buckle test, 90°modified tripod jacket structure is good performed. These four designs of modified tripod jacket structures simplify the process of construction and reduce the construction cost. This is because modified tripod jacket structures have less braces and less welding points.


口試委員會審定書 i
誌謝 ii
中文摘要 iii
ABSTRACT iv
目錄 v
圖目錄 viii
表目錄 xiii
第1章 緒論 1
1.1 研究動機與背景 1
1.2 文獻回顧 13
1.3 本文研究方法 21
1.4 論文架構 23
第2章 幾何模型設計與改良 24
2.1 桁架式支撐結構的規格 24
2.1.1 傳統桁架式支撐結構(Traditional Jacket Structure) 29
2.1.2 扭曲桁架式支撐結構(Twisted Jacket Structure) 34
2.1.3 三腳桁架式支撐結構(Tripod Jacket Structure) 40
2.1.4 新型三腳桁架式支撐結構(Modified Tripod Jacket Structure) 44
2.2 各種桁架式支撐結構桿件定義 51
第3章 負載設定方式 56
3.1 負載類型介紹 56
3.1.1 風的概況 56
3.1.2 波浪的概況 57
3.1.3 水流的概況 58
3.2 負載設定 58
3.2.1 永久的負載 58
3.2.2 環境的負載 58
3.2.3 風的負載 60
3.2.4 波浪的負載 61
3.2.5 水流的負載 62
3.2.6 數值模擬的負載設定 63
第4章 ABAQUS之風機支撐結構分析 65
4.1 假設與約束 65
4.2 5MW桁架式支撐結構梁元素(Beam Element)分析 67
4.2.1 傳統桁架式支撐結構梁元素分析 71
4.2.2 扭曲桁架式支撐結構梁元素分析 72
4.2.3 三腳桁架式支撐結構梁元素分析 74
4.2.4 新型三腳桁架式支撐結構梁元素分析 76
4.2.5 14種桁架式支撐結構梁元素分析比較 77
4.3 5MW桁架式支撐結構薄殼元素(Shell Element)分析 79
4.3.1 傳統桁架式支撐結構薄殼元素分析 82
4.3.2 扭曲桁架式支撐結構薄殼元素分析 84
4.3.3 三腳桁架式支撐結構薄殼元素分析 85
4.3.4 新型三腳桁架式支撐結構薄殼元素分析 87
4.3.5 14種桁架式支撐結構薄殼元素分析比較 88
4.3.6 薄殼元素與梁元素的比較 90
4.4 5MW桁架式支撐結構挫曲分析(Buckle Analysis) 93
4.4.1 傳統桁架式支撐結構挫曲分析 95
4.4.2 扭曲桁架式支撐結構挫曲分析 98
4.4.3 三腳桁架式支撐結構挫曲分析 103
4.4.4 新型三腳桁架式支撐結構挫曲分析 107
4.4.5 14種桁架式支撐結構的挫曲分析比較 112
第5章 5MW風機塔架實驗結果 114
5.1 實驗架設 115
5.1.1 實驗架構 116
5.1.2 試驗物件 119
5.1.3 實驗方法及數據擷取 121
5.2 有限元素模型 124
5.3 實驗與數值模擬結果比較討論 125
5.3.1 實驗結果檢視 125
5.3.2 力-位移比較 128
第6章 結論及未來展望 134
參考文獻 136


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