Posters - WindEurope Annual Event 2024

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We would like to invite you to come and see the posters at our upcoming conference. The posters will showcase a diverse range of research topics, and will give delegates an opportunity to engage with the authors and learn more about their work. Whether you are a seasoned researcher or simply curious about the latest developments in your field, we believe that the posters will offer something of interest to everyone. So please join us at the conference and take advantage of this opportunity to learn and engage with your peers in the academic community. We look forward to seeing you there!

PO103: Controller influence on the fatigue of a floating offshore wind turbine and load case impact assessment

Alberto Sánchez, Loads Engineer, Nautilus


The fatigue assessment of a Floating Offshore Wind Turbine (FOWT) is a complex and still widely discussed matter in industry. Sea and wind conditions have a large impact on the dynamic behaviour of the FOWT, which conditions fatigue calculations in a great manner. In addition, the influence of the WT blade aerodynamics and the blade control on the structure dynamics further complicates such assessment. This paper will assess the impact that different WT controllers and aerodynamic hypotheses have on the performance and the dynamic behaviour of the FOWT, and more specifically, on its fatigue prediction. Given the current state of the art, and considering nowadays standard computational capabilities, it becomes an almost impossible endeavour to run a fully detailed fatigue simulation, coupling all dynamic sources of excitation, in all possible sea and wind conditions. In order to overcome this problem, reduced models have been used and different methodological approaches have been attempted to successfully predict life and fatigue of FOWT over the last decades. The calculation of Damage Equivalent Loads (DEL) is one of the most widely used methodologies to assess fatigue. Although DEL calculation is a useful tool in the calculation of fatigue, it does not allow comparison of different load cases in order to assess the largest contributors to fatigue. Hereby, a new DEL formulation is proposed, enabling a direct comparison of loading cases and the identification of the operational areas that are more critical to the FOWT life.

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