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OC6 Phase I : Investigating the underprediction of low-frequency hydrodynamic loads and responses of a floating wind turbine

A. N. Robertson 1 S. Gueydon 2 E. Bachynski 3 L. Wang 1 J. Jonkman 1 D. Alarcón 4 E. Amet 5 A. Beardsell 6 P. Bonnet 7 B. Boudet 5 C. Brun 5 Z. Chen 8 M. Feron 9 D. Forbush 10 C. Galinos 11 J. Galvan 12 P. Gilbert 13 J. Gomez 14 V. Harnois 14 F. Haudin 15 Z. Hu 16 J. Le Dreff 17 M. Leimeister 18 F. Lemmer 19 H. Li 3 G. Mac Kinnon 20 Iñigo Mendikoa 12 A. Moghtadaei 21 S. Netzband 22 S. Oh 23 A. Pegalajar-Jurado 11 M. Q. Nguyen 15 K. Ruehl 10 P. Schunemann 24 W. Shi 25 H. Shin 26 Y. Si 8 F. Surmont 5 P. Trubat 4 J. Qwist 27 S. Wohlfahrt-Laymann 19 
Abstract : Phase I of the OC6 project is focused on examining why offshore wind design tools underpredict the response (loads/motion) of the OC5-DeepCwind semisubmersible at its surge and pitch natural frequencies. Previous investigations showed that the underprediction was primarily related to nonlinear hydrodynamic loading, so two new validation campaigns were performed to separately examine the different hydrodynamic load components. In this paper, we validate a variety of tools against this new test data, focusing on the ability to accurately model the low-frequency loads on a semisubmersible floater when held fixed under wave excitation and when forced to oscillate in the surge direction. However, it is observed that models providing better load predictions in these two scenarios do not necessarily produce a more accurate motion response in a moored configuration.
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Submitted on : Monday, November 16, 2020 - 3:09:45 PM
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A. N. Robertson, S. Gueydon, E. Bachynski, L. Wang, J. Jonkman, et al.. OC6 Phase I : Investigating the underprediction of low-frequency hydrodynamic loads and responses of a floating wind turbine. Journal of Physics: Conference Series, IOP Publishing, 2020, 1618, pp.032033. ⟨10.1088/1742-6596/1618/3/032033⟩. ⟨hal-03007787⟩



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