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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, 32nd International Conference on Ocean, Offshore and Arctic Engineering (OMAE 2013), Nantes, France, OMAE2013-11204
In order to have reference values to use as design targets, it is necessary to predict the most probable maximum values of motion parameters such as accelerations, displacements or relative motions which are likely to occur in a period of floaters lifetime. These design values are obtained by determining long-term probability distributions, which depend on the transfer functions that predict the amplitude of the wave induced motions and on the wave spectra and wave climate descriptions. The sway, heave and pitch motions of the floater influence the operability of offshore wind turbine.
In the present study, we will compare the long-term probability distribution of spar, windfloat and semi-submersible type floating wind turbine responses for sway, heave and pitch motions and different sources of wave data. The long-term distributions will be determined for different configurations of floaters and for different wave climate descriptions. The long-term predictions of most probable maximum values of motion amplitudes will help in 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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