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研究生： 孫韋喆
Sun, Wei-Jhe
論文名稱： 超大型離岸風機採負壓式沉箱基礎在地震與颱風作用下之設計與分析
Design and Analysis of Suction Pile-based Large-scale Offshore Wind Turbines under Earthquakes and Typhoons
指導教授： 朱聖浩
Ju, Shen-Haw
學位類別： 碩士
Master
系所名稱： 工學院 - 土木工程學系
Department of Civil Engineering
論文出版年： 2022
畢業學年度： 110
語文別： 英文
論文頁數： 95
中文關鍵詞： 超大型離岸風機 、負壓式沉箱 、套管式離岸風機支撐結構 、設計用鋼量
外文關鍵詞： Large Scale offshore wind turbine, Suction pile, Jacket-type support structure, Total design steel weight
相關次數： 點閱：151  下載：33 
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    • 隨著全球對於永續發展與環境保護的提倡，再生能源成為未來能源的發展趨勢，相關的需求也逐年增加。在風力發電的部分，除了拓展風機的發電範圍之外，提高單一風機的發電量也是現階段的發展目標，因此超大型風機的研究逐漸展開。有鑑於現今還能開發的陸上資源有限，離岸風機成為此領域發展的重要方向。伴隨著大型化的離岸風機，相關的規劃設置地點也從一開始的沿海地區(海水深度30公尺處)延伸至離岸較遠的外海處(海水深度50至80公尺處)。將風機往更深的水域去設置雖能增加整體發電量，但如何施工安裝成為新的考驗。以目前的施工方式在深水海域打設樁基礎會使得施工的經費提高，而且大範圍的水下施工所造成的噪音問題可能會影響到原生水域的生態，為了解決相關問題，本論文探討負壓式沉箱(suction pile)作為超大型風機的樁基礎，針對分析與設計進行深入研究。
    負壓式沉箱基礎有別於普通細長的樁基礎，為了更符合實際情況，在分析樁土互制行為(即土壤彈簧模型)時，會將有限元素模型的節點從基礎的形心位置更改到基礎的表面邊界上，以達到更實際的模型。而在設計風機支撐結構的尺寸方面，採用國際電工委員會所編修的設計規範IEC61400-3-1:2019建議之載重案例，設計出10MW、15MW與20MW離岸風機的支撐結構用鋼量。針對各種設計結果蒐集主要控制之案例，探討其所發生的原因，研究其受力狀態與位移情形。最後將與一般的樁基礎設計案例來做比較，研究兩者間的差異與優劣。本研究所使用的電腦輔助分析程式由朱聖浩教授研究團隊所開發，分析程式與研究成果皆為公開資源。

    With the promotion of sustainable development and environmental protection in global society, renewable energy has become the trend of future energy, and the related demand is increasing year by year. In the wind power industry, in addition to expanding the power generation range of wind turbines, increasing the power generation of a single wind turbine is also a goal at this stage. Therefore, research on large scale wind turbines is gradually being invested. In view of the limited onshore resources that can be developed, offshore wind turbines (OWTs) have become a development direction in this field. With the growing scale of OWTs, the relevant installation sites extend from the initial coastal area (sea depth of 30 meters) to the far sea area (sea depth of 50 to 80 meters). Placing wind turbines in deeper water can increase power generation, but how to build and install it presents a new challenge. Carrying out pile foundation construction in deep water with the current construction method will increase the construction cost, and the noise problem caused by underwater construction may affect the ecology of the native waters. In order to solve the related problems, this thesis discusses the suction pile as the pile foundation of the large scale OWTs, and conducts a study on its analysis and design.
    The suction pile foundation is different from the traditional pile foundation. To be more realistic, when analyzing soil-structure interaction behavior, the nodes of the finite element model were changed from the center of shape of the foundation to the surface boundary. The dimension design of the wind turbine support structure follows specification IEC61400-3-1:2019 compiled by the International Electrotechnical Commission. The control cases for various design results will be studied. Finally, the design result will be compared with the traditional pile foundation, and the difference, advantages and disadvantages of these two will be studied. Note that the computer programs developed by the research team of Shen-Haw Ju are open and free to use.

    摘要 I Abstract II Acknowledgement III Contents IV List of Tables VII List of Figures IX Chapter 1 Introduction 1 1.1 Background and purpose 1 1.2 Literature review 2 1.2.1 Research on the large scale of OWTs structure 2 1.2.2 The impact of typhoon on OWTs structure 3 1.2.3 The impact of earthquake on OWTs structure 3 1.3 Overview 5 Chapter 2 Suction Pile Foundation 6 2.1 Basic introduction 6 2.1.1 Suction pile 6 2.1.2 Installation process 6 2.2 Advantage 8 2.3 Application 9 Chapter 3 Model and Analysis Method 10 3.1 Soil-structure interaction 10 3.1.1 P-y spring 10 3.1.2 T-z spring and q-z spring 15 3.2 Theory of nonlinear spring under dynamic load model 19 3.2.2 P-y spring 20 3.2.3 T-z spring 22 3.2.4 Q-z spring 23 3.3 Suction pile model 24 3.3.2 Rigid link 25 3.4 Dynamic analysis 26 Chapter 4 The Programs and Cases 29 4.1 Spring programs 29 4.1.1 Rigid link program 29 4.1.2 P-y, t-z, q-z spring program 29 4.2 Program test 32 4.2.1 Input file of q-z spring 32 4.2.2 Simple test to check q-z spring program 34 4.3 Single pile installation process 37 4.3.1 fsuction program 37 4.3.2 Study case by fsuction 39 4.4 Overall analysis process of suction pile 40 4.5 Program integration 41 Chapter 5 Case Study and Result Discussion 43 5.1 Case structure 43 5.2 Design load case (DLC) 46 5.3 Analysis results 57 5.3.1 Design steel amount for OWTs 57 5.3.2 Control Cases 62 5.4 Comparison to the case with traditional deep piles 67 5.4.1 Traditional pile introduction 67 5.4.2 Comparison of design steel amounts 68 5.4.3 Comparison of control cases 69 5.5 Advantages and disadvantages 75 Chapter 6 Conclusions 76 6.1 Conclusions 76 6.2 Future work 77 Reference 79 Appendix A. fsuction Program 82 Appendix B. Design Results 84

    [1] S.-H. Ju, Y.-C. Huang, and Y.-Y. Huang, "Study of optimal large-scale offshore wind turbines," Renewable Energy, vol. 154, pp. 161-174, 2020, doi: 10.1016/j.renene.2020.02.106.
    [2] C. Qin et al., "Downwind coning concept rotor for a 25 MW offshore wind turbine," Renewable Energy, vol. 156, pp. 314-327, 2020, doi: 10.1016/j.renene.2020.04.039.
    [3] Y. Chen, X. Jin, H. Liu, F. Li, and M. Luo, "Large scale wind turbine TMD optimization based on Blade-Nacelle-Tower-Foundation Coupled Model," Ocean Engineering, vol. 239, 2021, doi: 10.1016/j.oceaneng.2021.109764.
    [4] E. G. Jennifer Rinker, Frederik Zahle, Witold Skrzypi´nski, Nikhar Abbas, Henrik Bredmose, Garrett Barterne Dykes, "Comparison of loads from HAWC2 and OpenFAST for the IEA Wind 15 MW Reference Wind Turbine," Journal of Physics: Conference Series, 2020.
    [5] A. Mathern, C. von der Haar, and S. Marx, "Concrete Support Structures for Offshore Wind Turbines: Current Status, Challenges, and Future Trends," Energies, vol. 14, no. 7, 2021, doi: 10.3390/en14071995.
    [6] J. I. B. W R Skrzypiński, Ch B Hasager, A-M Tilg, Ch Bak, F Vejen, "Optimization of the erosion-safe operation of the IEA Wind 15 MW Reference Wind Turbine," Journal of Physics: Conference Series, 2020.
    [7] Y. Chen, D. Wu, Y. Yu, and W. Gao, "Do cyclone impacts really matter for the long-term performance of an offshore wind turbine?," Renewable Energy, vol. 178, pp. 184-201, 2021, doi: 10.1016/j.renene.2021.06.044.
    [8] S. H. Ju, F. C. Su, Y. T. Jiang, and Y. C. Chiu, "Ultimate load design of jacket‐type offshore wind turbines under tropical cyclones," Wind Energy, vol. 22, no. 5, pp. 685-697, 2019, doi: 10.1002/we.2315.
    [9] H. Ma, Z. Lu, Y. Li, C. Chen, and J. Yang, "Permanent accumulated rotation of offshore wind turbine monopile due to typhoon-induced cyclic loading," Marine Structures, vol. 80, 2021, doi: 10.1016/j.marstruc.2021.103079.
    [10] J. Lian, Y. Jia, H. Wang, and F. Liu, "Numerical Study of the Aerodynamic Loads on Offshore Wind Turbines under Typhoon with Full Wind Direction," Energies, vol. 9, no. 8, 2016, doi: 10.3390/en9080613.
    [11] N. Alati, G. Failla, and F. Arena, "Seismic analysis of offshore wind turbines on bottom-fixed support structures," Philos Trans A Math Phys Eng Sci, vol. 373, no. 2035, Feb 28 2015, doi: 10.1098/rsta.2014.0086.
    [12] A. Brendike, F. Ostermann, and F. Lüddecke, "Offshore wind jacket foundation design challenges in earthquake regions," Stahlbau, vol. 87, no. 9, pp. 860-868, 2018, doi: 10.1002/stab.201810049.
    [13] V. Chaudhari and S. N. Somala, "Seismic performance of offshore wind turbine in the vicinity of seamount subduction zone," Structures, vol. 34, pp. 423-432, 2021, doi: 10.1016/j.istruc.2021.07.080.
    [14] R. De Risi, S. Bhattacharya, and K. Goda, "Seismic performance assessment of monopile-supported offshore wind turbines using unscaled natural earthquake records," Soil Dynamics and Earthquake Engineering, vol. 109, pp. 154-172, 2018, doi: 10.1016/j.soildyn.2018.03.015.
    [15] A. Ali, R. De Risi, A. Sextos, K. Goda, and Z. Chang, "Seismic vulnerability of offshore wind turbines to pulse and non‐pulse records," Earthquake Engineering & Structural Dynamics, vol. 49, no. 1, pp. 24-50, 2019, doi: 10.1002/eqe.3222.
    [16] Y. Yang, M. Bashir, C. Li, and J. Wang, "Analysis of seismic behaviour of an offshore wind turbine with a flexible foundation," Ocean Engineering, vol. 178, pp. 215-228, 2019, doi: 10.1016/j.oceaneng.2019.02.077.
    [17] Y. Yan, C. Li, and Z. Li, "Buckling analysis of a 10 MW offshore wind turbine subjected to wind-wave-earthquake loadings," Ocean Engineering, vol. 236, 2021, doi: 10.1016/j.oceaneng.2021.109452.
    [18] S. K. Patra and S. Haldar, "Seismic response of monopile supported offshore wind turbine in liquefiable soil," Structures, vol. 31, pp. 248-265, 2021, doi: 10.1016/j.istruc.2021.01.095.
    [19] M. Zhao, Z. Gao, P. Wang, and X. Du, "Response spectrum method for seismic analysis of monopile offshore wind turbine," Soil Dynamics and Earthquake Engineering, vol. 136, 2020, doi: 10.1016/j.soildyn.2020.106212.
    [20] Y. Yang, M. Bashir, C. Li, C. Michailides, and J. Wang, "Mitigation of coupled wind-wave-earthquake responses of a 10 MW fixed-bottom offshore wind turbine," Renewable Energy, vol. 157, pp. 1171-1184, 2020, doi: 10.1016/j.renene.2020.05.077.
    [21] W. Jiang, C. Lin, and M. Sun, "Seismic responses of monopile-supported offshore wind turbines in soft clays under scoured conditions," Soil Dynamics and Earthquake Engineering, vol. 142, 2021, doi: 10.1016/j.soildyn.2020.106549.
    [22] A. M. Kaynia, "Effect of kinematic interaction on seismic response of offshore wind turbines on monopiles," Earthquake Engineering & Structural Dynamics, vol. 50, no. 3, pp. 777-790, 2020, doi: 10.1002/eqe.3371.
    [23] R. Mo, R. Cao, M. Liu, M. Li, and Y. Huang, "Seismic fragility analysis of monopile offshore wind turbines considering ground motion directionality," Ocean Engineering, vol. 235, 2021, doi: 10.1016/j.oceaneng.2021.109414.
    [24] 經濟部能源局. (2021). 海洋生態研析-示範風場營運期間測作業研究報告(摘要版). [Online] Available: https://www.moeaboe.gov.tw/ECW/populace/content/ContentDesc.aspx?menu_id=14386
    [25] Suction bucket jacket: Development and case study https://orsted.tw/ (accessed 07/27, 2022).
    [26] R. W. Boulanger, "SEISMIC SOIL-PILE-STRUCTURE INTERACTION EXPERIMENTS AND ANALYSES," geotechnical and geoenvironmental engineering, 1999.
    [27] S.-H. Ju, "INVESTIGATING CONTACT STRESSES ON ARTICULAR SURFACES BY 3D RIGID LINKS," Engineering Mechanics 1997.
    [28] S.-H. Ju, "Ocean EngineeringAnalyses of offshore wind turbine structures with soil-structure interaction under earthquakes," 2019.
    [29] C. Bak, "The DTU 10-MW Reference Wind Turbine," DTU, 2013.
    [30] Evan Gaertne et al., "Definition of the IEA Wind 15-Megawatt Offshore Reference Wind Turbine," 2020

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