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Representative Environmental Condition for Fatigue Analysis of Offshore Jacket Substructure

Author

Listed:
  • Tsung-Yueh Lin

    (Research Department, CR Classification Society, Taipei 10491, Taiwan)

  • Yi-Qing Zhao

    (Naval Shipbuilding Development Center, Taipei 10404, Taiwan)

  • Hsin-Haou Huang

    (Department of Engineering Science and Ocean Engineering, National Taiwan University, Taipei 10617, Taiwan)

Abstract

The 20-year cumulative fatigue damage of an offshore jacket substructure was estimated under the long-term local environmental conditions in the Taiwan Strait. Because of the nonlinearity of wave load for slender members of the structure, time-domain simulations of the dynamic finite element model were conducted for each sea state. By utilizing the Dirlik method to process the stress signals, the fatigue damages of joints were computed. Concerning the computational time, we propose a probability-based method of using a representative combination of environmental conditions in this study, which can considerably reduce the required number of evaluations prior to determining fatigue damage, thereby improving the process of preliminary design. The results show that only three sea states among 120 can represent 28% of the average damage ratio, and up to 17 sea states fully resolved the fatigue life.

Suggested Citation

  • 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.
    • Handle: RePEc:gam:jeners:v:13:y:2020:i:20:p:5494-:d:431932
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    References listed on IDEAS

    as
    1. I-Wen Chen & Bao-Leng Wong & Yu-Hung Lin & Shiu-Wu Chau & Hsin-Haou Huang, 2016. "Design and Analysis of Jacket Substructures for Offshore Wind Turbines," Energies, MDPI, vol. 9(4), pages 1-24, April.
    2. Chi-Yu Chian & Yi-Qing Zhao & Tsung-Yueh Lin & Bryan Nelson & Hsin-Haou Huang, 2018. "Comparative Study of Time-Domain Fatigue Assessments for an Offshore Wind Turbine Jacket Substructure by Using Conventional Grid-Based and Monte Carlo Sampling Methods," Energies, MDPI, vol. 11(11), pages 1-17, November.
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    Cited by:

    1. Ju, Shen-Haw, 2022. "Increasing the fatigue life of offshore wind turbine jacket structures using yaw stiffness and damping," Renewable and Sustainable Energy Reviews, Elsevier, vol. 162(C).
    2. 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.

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