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Directional Bending Performance of 4-Leg Jacket Substructure Supporting a 3MW Offshore Wind Turbine

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  • Thanh-Tuan Tran

    (Institute of Offshore Wind Energy, Kunsan National University, 558 Daehak-ro, Gunsan-City 54150, Jeollabuk-do, Korea
    Faculty of Technology and Technique, Quy Nhon University, Binh Dinh 55100, Vietnam)

  • Sangkyun Kang

    (Department of Mechanical Engineering, Kunsan National University, 558 Daehak-ro, Gunsan-City 54150, Jeollabuk-do, Korea)

  • Jang-Ho Lee

    (Department of Mechanical Engineering, Kunsan National University, 558 Daehak-ro, Gunsan-City 54150, Jeollabuk-do, Korea)

  • Daeyong Lee

    (Institute of Offshore Wind Energy, Kunsan National University, 558 Daehak-ro, Gunsan-City 54150, Jeollabuk-do, Korea)

Abstract

A comprehensive investigation of the directional bending performance of a 4-leg jacket substructure, supporting a 3 MW offshore wind turbine, has been carried out in this study. The jacket substructure with a Pratt bracing system which is already installed in the southwest offshore wind farm in South Korea has been chosen as a reference support structure. A numerical model of the 3MW support structure (i.e., tower, transition piece, and jacket structure) is configured, and its structural performances are evaluated under the conditions of (1) extreme environmental loads (Env), (2) critical Design Load Cases (DLCs), and (3) a total of 288 combined load cases (CBs). For the case of Env (i.e., wind, wave, and current loads), loading directions varying from 0° to 360° at intervals of 15° are considered. The DLCs are provided from the 3 MW wind turbine manufacturer, in a 6 × 12 matrix format. The selected 4-leg jacket substructure in this study showed the smallest bending stiffness at the loading angles of 135° and 315° under the condition of Env, and at the loading angles between 105° and 150° under the CBs. From these results, critical bending directionality of the 4-leg jacket substructure is identified. This study also found that the effects of Env loads are not small compared to the total structural responses of the 4-leg jacket substructure which is supporting a 3 MW offshore wind turbine.

Suggested Citation

  • Thanh-Tuan Tran & Sangkyun Kang & Jang-Ho Lee & Daeyong Lee, 2021. "Directional Bending Performance of 4-Leg Jacket Substructure Supporting a 3MW Offshore Wind Turbine," Energies, MDPI, vol. 14(9), pages 1-17, May.
    • Handle: RePEc:gam:jeners:v:14:y:2021:i:9:p:2725-:d:551509
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    References listed on IDEAS

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    1. Tsung-Yueh Lin & Yi-Qing Zhao & Hsin-Haou Huang, 2020. "Representative Environmental Condition for Fatigue Analysis of Offshore Jacket Substructure," Energies, MDPI, vol. 13(20), pages 1-20, October.
    2. Jianhua Zhang & Won-Hee Kang & Ke Sun & Fushun Liu, 2019. "Reliability-Based Serviceability Limit State Design of a Jacket Substructure for an Offshore Wind Turbine," Energies, MDPI, vol. 12(14), pages 1-16, July.
    3. Ko, Kyungnam & Kim, Kyoungbo & Huh, Jongchul, 2010. "Variations of wind speed in time on Jeju Island, Korea," Energy, Elsevier, vol. 35(8), pages 3381-3387.
    4. Kim, Dong Hyawn & Lee, Sang Geun, 2015. "Reliability analysis of offshore wind turbine support structures under extreme ocean environmental loads," Renewable Energy, Elsevier, vol. 79(C), pages 161-166.
    5. Shi, Wei & Han, Jonghoon & Kim, Changwan & Lee, Daeyong & Shin, Hyunkyoung & Park, Hyunchul, 2015. "Feasibility study of offshore wind turbine substructures for southwest offshore wind farm project in Korea," Renewable Energy, Elsevier, vol. 74(C), pages 406-413.
    6. Shi, Wei & Park, Hyunchul & Han, Jonghoon & Na, Sangkwon & Kim, Changwan, 2013. "A study on the effect of different modeling parameters on the dynamic response of a jacket-type offshore wind turbine in the Korean Southwest Sea," Renewable Energy, Elsevier, vol. 58(C), pages 50-59.
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    Cited by:

    1. Thanh-Tuan Tran & Sangkyun Kang & Daeyong Lee, 2022. "Improving Structural Safety of L-Type Flange Joint for Wind Towers," Energies, MDPI, vol. 15(23), pages 1-14, November.
    2. Chenyang Yuan & Yunfei Xie & Jing Li & Weifeng Bai & Haohao Li, 2022. "Influence of the Number of Ground Motions on Fragility Analysis of 5 MW Wind Turbines Subjected to Aerodynamic and Seismic Loads Interaction," Energies, MDPI, vol. 15(6), pages 1-18, March.

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