DeRisk - Accurate prediction of ULS wave loads. Outlook and first results

Henrik Bredmose, Martin Dixen, Amin Ghadirian, Torben J. Larsen, Signe Schløer, Søren Juhl Andersen, Shaofeng Wang, Harry B. Bingham, Ole Lindberg, Erik Damgaard Christensen, Malene Hovgaard Vested, Stefan Carstensen, Allan Peter Engsig-Karup, Ole Skov Petersen, H. F. Hansen, Jesper Sandvig Mariegaard, P. H. Taylor, T. A. A. Adcock, C. Obhrai, O. T. GudmestadNiels Jacob Tarp-Johansen, C. P. Meyer, J. R. Krokstad, L. Suja-Thauvin, T. D. Hanson

Research output: Contribution to journalConference articleResearchpeer-review

458 Downloads (Pure)


Loads from extreme waves can be dimensioning for the substructures of offshore wind turbines. The DeRisk project (2015-2019) aims at an improved load evaluation procedure for extreme waves through application of advanced wave models, laboratory tests of load effects, development of hydrodynamic load models, aero-elastic response calculations and statistical analysis. This first paper from the project outlines the content and philosophy behind DeRisk. Next, the first results from laboratory tests with irregular waves are presented, including results for 2D and 3D focused wave groups. The results of focused wave group tests and a 6-hour (full scale duration) test are reproduced numerically by re-application of the wave paddle signal in a fully nonlinear potential flow wave model. A good match for the free surface elevation and associated exceedance probability curve is obtained. Finally, the utilization of DeRisk's results in practical design is discussed. (C) 2016 Published by Elsevier Ltd.
Original languageEnglish
JournalEnergy Procedia
Pages (from-to)379-387
Publication statusPublished - 2016
Event13th Deep Sea Offshore Wind R&D Conference - Trondheim, Norway
Duration: 20 Jan 201622 Jan 2016


Conference13th Deep Sea Offshore Wind R&D Conference
Internet address

Bibliographical note

Copyright 2016 Published by Elsevier Ltd.This is an open access article under the CC BY-NC-ND license.


  • Extreme waves
  • Offshore wind turbines
  • Hydrodynamic loads
  • Numerical modelling
  • Physical model tests


Dive into the research topics of 'DeRisk - Accurate prediction of ULS wave loads. Outlook and first results'. Together they form a unique fingerprint.

Cite this