Investigation on the limit state of a triple-column spar floating wind turbine concept

Li, Liang and Wang, Jin; (2020) Investigation on the limit state of a triple-column spar floating wind turbine concept. In: 30th International Ocean and Polar Engineering Conference. International Society of Offshore and Polar Engineers, CHN, pp. 440-445. ISBN 9781880653845

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    Abstract

    The limit state of a newly proposed floating wind turbine concept, in terms of ultimate structural load and fatigue damage load, is studied in the present work. This novel floating structure utilizes a triple-column spar platform to support the wind turbine. An aero-hydro-servo-elastic numerical model is developed to simulate its coupled dynamics. The probability distribution of the ultimate structural load is estimated based on the Monte-Carlo method. In order to reduce computation endeavor, a statistic model is used to extrapolate the sampled-based distribution function. The S-N curve method, a state-of-art fatigue analysis approach, is used to assess the fatigue damage load. The limit states of tower base and fairlead are investigated. It is shown that the newly proposed triple-column spar concept suffers less fatigue damage and the ultimate structural loads are also reduced, resulting in the enhancement of safety level of the floating wind turbine system.

    ORCID iDs

    Li, Liang ORCID logoORCID: https://orcid.org/0000-0002-8528-3171 and Wang, Jin;