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

Research output: Contribution to journalArticlepeer-review

64 Scopus Citations

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 languageAmerican English
Article numberArticle No. 032033
Number of pages11
JournalJournal of Physics: Conference Series
Volume1618
Issue number3
DOIs
StatePublished - 22 Sep 2020
EventScience of Making Torque from Wind 2020, TORQUE 2020 - Virtual, Online, Netherlands
Duration: 28 Sep 20202 Oct 2020

Bibliographical note

Publisher Copyright:
© 2020 Published under licence by IOP Publishing Ltd.

NREL Publication Number

  • NREL/JA-5000-76210

Keywords

  • hydrodynamic loads
  • offshore wind

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