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Group of Marine Dynamics and Hydrodynamics > 2.1 Dynamics of Moored Floaters > Publications
Raed, K., Karmakar, D. and Guedes Soares, C. (2025), Effect of the wind turbine floater geometry on the uncertainty associated with the hydrodynamic loading, Ocean Engineering, Vol. 330, 121134.
The study aims to contribute to the establishment of the reliability-based design for floating offshore wind turbines by quantifying the uncertainty in Morison's wave force in the extreme conditions for two floating wind turbine platforms, namely, the Spar and the OC4 DeepCwind semi-submersible. Numerical models are developed to estimate the wave forces on cylindrical members with different configurations and then to quantify the uncertainty in the output using the propagation law of uncertainty. Morison's coefficients are extracted from Sarpkaya's data as a function of relative roughness, Keulegan-Carpenter number, Reynolds number and the member inclination angle. The combined uncertainty for each input is investigated based on the gathered data from different sources of uncertainties. The First-Order Second Moment method is then adopted to quantify the output uncertainty based on the input's uncertainty. Moreover, the contribution of each random variable to the total uncertainty is explored. The study shows that the wave height is the most contributed random variable in the total uncertainty.
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