臺灣博碩士論文加值系統

近年世界各國為解決因傳統能源產生的環境問題正積極尋找新的替代能源，風力發電的低汙染性為各國積極發展的重點替代能源之一。因陸域風場的飽和，風能技術發展較為成熟之歐洲各國逐轉往開發離岸風能。風機支撐結構受震反應分析為結構設計階段幾何尺寸設計、驗證技術開發及運轉中受震預警之評估依據。
本研究應用非線性有限元素分析軟體ABAQUS，分析離岸風機單樁基礎支撐結構受不同週期地震基底加速作用之反應。並應用無限元素於數值模型以提高分析之效率及準確性。
土壤莫爾庫倫破壞參數之施加對動態分析影響甚巨，未考慮土壤動態阻尼與考慮土壤動態阻尼之分析結果差異甚巨。外力週期逐漸變長，基樁頂部之相對位移也會隨之變大。

In recent years, nations over the world are actively looking for new alternative energy due to environmental problems caused by traditional energy, and wind power is one of the alternative energy that many countries are developing actively. As wind farms on land have gone developed, European countries whose wind power techniques are more developed began to develop offshore wind power. Analysis of the seismic responses of the foundation of wind turbines is the basis of the assessment of geometric dimensioning during structure designing, developing testing techniques and seismic alarm during operation.

This proposal applied ABAQUS, a software for nonlinear finite element analysis,to analyze the reaction of monopole support structure of offshore wind turbines affected by different period of acceleration of the earthquake basement. It also added infinite element in digital models to increase the efficiency and accuracy of analysis.

Mohr–Coulomb failure parameter has a significant effect on dynamic analysis. Considering Soil damping or not also has an impact on the analysis result. As the period of external forces was lengthened, the relative displacement of the top of the foundation piles increased.

摘要 I
致謝 VI
目錄 VII
表目錄 X
圖目錄 XII
符號說明 XV
第1章 緒論 1
1.1 前言 1
1.2 文獻回顧 3
1.3 研究方法 4
第2章 風機形式 5
2.1 風機形式 5
第3章 材料性質 8
3.1 鋼材料性質 8
3.2 土壤材料性質 9
3.3 土壤阻尼的建立 11
第4章 有限元素及無限元素模型 14
4.1 元素選擇 14
4.1.1 有限元素 14
4.1.2 無限元素 16
4.2 懸臂鋼管模型 21
4.2.1 數值模型尺寸 21
4.2.2 數值模型邊界條件 22
4.2.3 數值模型接觸條件 24
4.3 樁土互制有限元素模型 25
4.3.1 數值模型尺寸 25
4.3.2 數值模型邊界條件 25
4.3.3 數值模型接觸條件 27
4.4 樁土互制無限元素模型 27
4.4.1 數值模型尺寸 27
4.4.2 數值模型邊界條件 28
4.4.3 數值模型接觸條件 30
4.5 懸臂鋼管受靜態外力之驗證 30
4.6 單樁基礎受動態外力之驗證 32
第5章 基礎受靜態外力 35
5.1 樁土互制有限元素模型分析 35
5.2 有限元素模型受靜態外力最佳樁土半徑比 40
5.3 收斂性分析 45
5.4 樁土互制有限及無限元素模型受靜態外力分析結果比較 47
第6章 基礎受動態外力 52
6.1 基底外力施加位置 52
6.2 樁土互制有限元素模型及無限元素模型結果比較 53
6.3 樁土互制無限元素模型結果分析 61
第7章 結論與建議 66
7.1 結論 66
7.2 建議 67
參考文獻 68
附錄 Abaqus input 70
A. 樁土互制無限元素土壤模型之動力分析 70
B. 單樁基礎模型之動力分析 77
C. 樁土互制有限元素模型之動力分析 80
D. 樁土互制無限元素土壤模型之靜力分析 85
E. 樁土互制有限元素模型之靜力分析 92

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