Prediction of Springing-induced Extreme Responses of a TLP-Type Floating Wind Turbine

Si-Hong Xie, Yong-Sheng Zhao, Yan-Ping He, Yan-Lin Shao, Zhao-Long Han, Chao Huang, Xiao-Li Gu

Research output: Chapter in Book/Report/Conference proceedingArticle in proceedingsResearchpeer-review


Floating wind turbines are designed to survive 50-year-extreme environmental conditions during their 20-year service life, as specified by International Electrotechnical Commission (IEC) standards. For a tension-leg platform (TLP)-type floating wind turbine, extreme wave loads can induce significant high-frequency resonant and transient responses, e.g. springing and ringing, which greatly amplify the structural responses of the floating wind turbines. This study aims to predict the springing-induced extreme responses of the WindStar TLP system by using FAST__(Fatigue, Aerodynamics, Structures, and Turbulence), a fully coupled simulation tool. The hydrodynamic loads considered include both first- and second-order wave-excitation loads. Different simulation sizes are compared. Different extreme-value prediction methods are applied and the results are compared. Both the peak-over-threshold (POT) and block maxima method (BMM) are applied to extract local maxima, which are then fitted using a threeparameter Weibull distribution. The average conditional exceedance rate (ACER) method and the Gumbel method are applied and compared with the above method.
Original languageEnglish
Title of host publicationProceedings of the Thirtieth (2020) International Ocean and Polar Engineering Conference
PublisherInternational Society of Offshore and Polar Engineers
Publication date2020
ISBN (Print)978-1-880653-84-5
Publication statusPublished - 2020
Event30th International Ocean and Polar Engineering Conference (ISOPE 2020) - Virtual event, Shanghai, China
Duration: 11 Oct 202016 Oct 2020


Conference30th International Ocean and Polar Engineering Conference (ISOPE 2020)
LocationVirtual event
SeriesProceedings of the International Offshore and Polar Engineering Conference


  • Floating wind turbine
  • Tension-leg platform
  • Springing response
  • Extreme theory

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