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Publications
Bagbanci, H., Karmakar, D. and Guedes Soares, C. (2013), “Comparison of spar and semi-submersible floater concepts of offshore wind turbines using long-term analysis”, Proceedings of the ASME 201332nd International Conference on Ocean, offshore and Arctic Engineering (OMAE2013), June 9-14, Nantes, France, pp. 11204
The long-term probability distributions of a spar and a semi-submersible offshore floating wind turbine responses are calculated for surge, heave and pitch motions and different sea states conditions. The transfer functions for surge, heave and pitch motions for the different floaters are obtained the using FAST code and they are also compared with results obtained in an experimental study. The long-term predictions of the most probable maximum values of motion amplitudes are used for design purposes, so as to guarantee the safety of the floating wind turbines against overturning in high waves and wind speed. The long-term distribution also allows the assessments of the long-term availability of the turbine, based on the probability of exceeding the operational limits and this availability is directly related with the power output and economic performance of the turbine.
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