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

Journal Article · · Journal of Physics. Conference Series
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  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Maritime Research Inst., Wageningen (Netherlands)
  3. Norwegian Univ. of Science and Technology, Trondheim (Norway)
  4. Bureau Veritas, Paris (France)
  5. DNV GL, Bristol (United Kingdom)
  6. Siemens Digital Industries Software, Cornellà (Spain)
  7. Bureau Veritas, Saint-Herblain (France)
  8. Zhejiang Univ., Zhoushan (China). Ocean College
  9. DORIS Engineering, Paris (France)
  10. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  11. DTU Wind Energy, Lyngby (Denmark)
  12. Tecnalia Research & Innovation, Derio (Spain)
  13. IFPEN, Rueil-Malmaison (France)
  14. PRINCIPIA, La Ciotat (France)
  15. Vulcain Ingénierie, Neuilly-sur-Seine (France)
  16. Newcastle Univ. (United Kingdom). School of Engineering
  17. EDF R&D, Palaiseau (France)
  18. Fraunhofer Inst. for Wind Energy Systems, Bremerhaven (Germany)
  19. Univ. of Stuttgart (Germany)
  20. Orcina Ltd., Ulverston (United Kingdom)
  21. Queen's Univ., Belfast, Northern Ireland (United Kingdom)
  22. Hamburg Univ. of Technology (Germany)
  23. ClassNK, Tokyo (Japan)
  24. Univ. of Rostock (Germany)
  25. Dalian Univ. of Technology (China)
  26. Univ. of Ulsan (South Korea)
  27. Univ. Politècnica de Catalunya, Barcelona (Spain)
  28. 4Subsea, Asker (Norway)
+ Show Author Affiliations
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.
Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
European Union (EU); USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Wind Energy Technologies Office
Grant/Contract Number:
AC36-08GO28308
OSTI ID:
1670151
Report Number(s):
NREL/JA--5000-76210; MainId:6583; UUID:90d33b37-0858-ea11-9c31-ac162d87dfe5; MainAdminID:15186
Journal Information:
Journal of Physics. Conference Series, Journal Name: Journal of Physics. Conference Series Vol. 1618; ISSN 1742-6588
Publisher:
IOP PublishingCopyright Statement
Country of Publication:
United States
Language:
English

References (6)

Reproduction of slow-drift motions of a floating wind turbine using second-order hydrodynamics and Operational Modal Analysis journal July 2019
Slow-drift of a floating wind turbine: An assessment of frequency-domain methods based on model tests journal February 2018
Model Test and Simulation Comparison for an Inclined-Leg TLP Dedicated to Floating Wind conference June 2017
Low‐frequency dynamics of a floating wind turbine in wave tank–scaled experiments with SiL hybrid method journal July 2019
OC5 Project Phase II: Validation of Global Loads of the DeepCwind Floating Semisubmersible Wind Turbine journal October 2017
Total experimental uncertainty in hydrodynamic testing of a semisubmersible wind turbine, considering numerical propagation of systematic uncertainty journal January 2020

Figures / Tables (12)

Figure 1(p. 2)figure Figure 1
Figure 2(p. 3)figure Figure 2
Table 1(p. 3)table Table 1
Table 2(p. 4)table Table 2
Table 3(p. 4)table Table 3
Table 4(p. 5)table Table 4
Figure 3(p. 6)figure Figure 3
Figure 4(p. 6)figure Figure 4
Figure 5(p. 7)figure Figure 5
Figure 6(p. 8)figure Figure 6
Table A1(p. 11)table Table A1
Table A2(p. 11)table Table A2

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Related Subjects

17 WIND ENERGY
hydrodynamic loads
offshore wind