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

A. N. Robertson*, S Gueydon, E. Bachynski, L. Wang, J. Jonkman, D. Alarcón, E. Amet, A. Beardsell, P. Bonnet, B. Boudet, C. Brun, Z. Chen, M. Féron, D. Forbush, C. Galinos, J. Galvan, P. Gilbert, J. Gómez, V. Harnois, F. HaudinZ. Hu, J. Le Dreff, M. Leimeister, F. Lemmer, H. Li, G. Mckinnon, I. Mendikoa, A. Moghtadaei, S. Netzband, S. Oh, A. Pegalajar-Jurado, M. Q. Nguyen, K. Ruehl, P. Schünemann, W. Shi, H Shin, Y. Si, F. Surmont, P. Trubat, J. Qwist, S. Wohlfahrt-Laymann

*Corresponding author for this work

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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.
Original languageEnglish
Article number032033
Book seriesJournal of Physics: Conference Series
Volume1618
Issue number3
Number of pages11
ISSN1742-6596
DOIs
Publication statusPublished - 2020
EventTORQUE 2020 - Online event, Netherlands
Duration: 28 Sep 20202 Oct 2020
https://www.torque2020.org/

Conference

ConferenceTORQUE 2020
LocationOnline event
CountryNetherlands
Period28/09/202002/10/2020
Internet address

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