COMPARATIVE STUDY ON FATIGUE CALCULATION METHODS FOR FLOATING WIND TURBINE FOUNDATIONS

Li Qiang; An Shuai; Liu Zhao; Yang Penglei

doi:10.19912/j.0254-0096.tynxb.2024-2050

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Acta Energiae Solaris Sinica ›› 2026, Vol. 47 ›› Issue (3) : 412-419. DOI: 10.19912/j.0254-0096.tynxb.2024-2050

COMPARATIVE STUDY ON FATIGUE CALCULATION METHODS FOR FLOATING WIND TURBINE FOUNDATIONS

Li Qiang, An Shuai, Liu Zhao, Yang Penglei

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Abstract

Taking the OC5 semi-submersible offshore floating wind turbine developed by NREL as the research object, an integrated simulation model was established for both the floating foundation and the wind turbine. Time domain and frequency domain spectral analysis methods were used to perform structural fatigue calculations on the floating foundation. Various approaches were employed to combine the fatigue damage induced by wind turbine loads and wave loads, and the results were compared with the fatigue damage of the structure under combined wind-waves loading conditions obtained through time-domain method. The research results indicate that the fatigue damage estimates derived from the damage combination method, equivalent stress 90° out-of-phase superposition method, and DNV specification method show the closest agreement with the time domain calculation results, making them suitable for the preliminary design of floating wind turbines.

Key words

offshore wind turbine / fatigue damage / time domain analysis / frequency domain analysis / integrated simulation / wind-wave combination

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Li Qiang, An Shuai, Liu Zhao, Yang Penglei. COMPARATIVE STUDY ON FATIGUE CALCULATION METHODS FOR FLOATING WIND TURBINE FOUNDATIONS[J]. Acta Energiae Solaris Sinica. 2026, 47(3): 412-419 https://doi.org/10.19912/j.0254-0096.tynxb.2024-2050

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