Gueydon, SBachynski, EWang, LJonkman, JAlarcón, DAmet, EBeardsell, ABonnet, PBoudet, BBrun, CChen, ZFéron, MForbush, DGalinos, CGalvan, JGilbert, PGómez, JHarnois, VHaudin, FHu, ZDreff, J LeLeimeister, MLemmer, FLi, HMckinnon, GMendikoa, IMoghtadaei, ANetzband, SOh, SPegalajar-Jurado, ANguyen, M QRuehl, KSchünemann, PShi, WShin, HSi, YSurmont, FTrubat, PQwist, JWohlfahrt-Laymann, SRobertson, A N2020-09-21Gueydon , S , Bachynski , E , Wang , L , Jonkman , J , Alarcón , D , Amet , E , Beardsell , A , Bonnet , P , Boudet , B , Brun , C , Chen , Z , Féron , M , Forbush , D , Galinos , C , Galvan , J , Gilbert , P , Gómez , J , Harnois , V , Haudin , F , Hu , Z , Dreff , J L , Leimeister , M , Lemmer , F , Li , H , Mckinnon , G , Mendikoa , I , Moghtadaei , A , Netzband , S , Oh , S , Pegalajar-Jurado , A , Nguyen , M Q , Ruehl , K , Schünemann , P , Shi , W , Shin , H , Si , Y , Surmont , F , Trubat , P , Qwist , J , Wohlfahrt-Laymann , S & Robertson , A N 2020 , ' OC6 Phase I: Investigating the underprediction of low-frequency hydrodynamic loads and responses of a floating wind turbine : Investigating the underprediction of low-frequency hydrodynamic loads and responses of a floating wind turbine ' , Journal of Physics: Conference Series , vol. 1618 , no. 3 , 032033 , pp. 32033 . https://doi.org/10.1088/1742-6596/1618/3/0320331742-6588researchoutputwizard: 11556/1007The authors would like to acknowledge the support of the MARINET2 project (European Union’s Horizon 2020 grant agreement 731084), which supplied the tank test time and travel support to accomplish the testing campaign. The support of MARIN in the preparation, execution of the modeltests, and the evaluation of the uncertainties was essential for this study. MARIN’s contribution was partly funded by the Dutch Ministry of Economic Affairs through TKI-ARD funding programs. This work was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under Contract No. DE-AC36- 08GO28308. Funding provided by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Wind Energy Technologies Office. The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains and the publisher, by accepting the article for publication, acknowledges that the U.S. Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this work, or allow others to do so, for U.S. Government purposes.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.12510226enginfo:eu-repo/semantics/openAccessconference output10.1088/1742-6596/1618/3/032033HydrodynamicsOffshore oil well productionTorqueWind turbinesAccurate motionFloating wind turbinesHydrodynamic loadsLoad predictionsLow-frequency loadNon-linear hydrodynamicsOffshore windsWave excitationSemisubmersiblesHydrodynamicsOffshore oil well productionTorqueWind turbinesAccurate motionFloating wind turbinesHydrodynamic loadsLoad predictionsLow-frequency loadNon-linear hydrodynamicsOffshore windsWave excitationSemisubmersiblesGeneral Physics and AstronomySDG 7 - Affordable and Clean EnergyProject IDinfo:eu-repo/grantAgreement/EC/H2020/731084/EU/Marine Renewable Infrastructure Network for Enhancing Technologies 2/MARINET2info:eu-repo/grantAgreement/EC/H2020/731084/EU/Marine Renewable Infrastructure Network for Enhancing Technologies 2/MARINET2Funding InfoThe authors would like to acknowledge the support of the MARINET2 project (European Union’s Horizon 2020 grant agreement 731084), which supplied the tank test time and travel support to accomplish the testing campaign. The support of MARIN in the preparation, execution of the modeltests, and the evaluation of the uncertainties was essential for this study. MARIN’s contribution was partly funded by the Dutch Ministry of Economic Affairs through TKI-ARD funding programs. This work was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under Contract No. DE-AC36- 08GO28308. Funding provided by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Wind Energy Technologies Office. The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains and the publisher, by accepting the article for publThe authors would like to acknowledge the support of the MARINET2 project (European Union’s Horizon 2020 grant agreement 731084), which supplied the tank test time and travel support to accomplish the testing campaign. The support of MARIN in the preparation, execution of the modeltests, and the evaluation of the uncertainties was essential for this study. MARIN’s contribution was partly funded by the Dutch Ministry of Economic Affairs through TKI-ARD funding programs. This work was authored in part by the National Renewable Energy Laboratory, operated by Alliance for Sustainable Energy, LLC, for the U.S. Department of Energy (DOE) under Contract No. DE-AC36- 08GO28308. Funding provided by the U.S. Department of Energy Office of Energy Efficiency and Renewable Energy Wind Energy Technologies Office. The views expressed in the article do not necessarily represent the views of the DOE or the U.S. Government. The U.S. Government retains and the publisher, by accepting the article for publhttp://www.scopus.com/inward/record.url?scp=85092368116&partnerID=8YFLogxK