RT Conference Proceedings
T1 OC5 Project Phase II: Validation of Global Loads of the DeepCwind Floating Semisubmersible Wind Turbine: 												Validation of Global Loads of the DeepCwind Floating Semisubmersible Wind Turbine
A1 Robertson, Amy N.
A1 Wendt, Fabian
A1 Jonkman, Jason M.
A1 Popko, Wojciech
A1 Dagher, Habib
A1 Gueydon, Sebastien
A1 Qvist, Jacob
A1 Vittori, Felipe
A1 Azcona, José
A1 Uzunoglu, Emre
A1 Soares, Carlos Guedes
A1 Harries, Rob
A1 Yde, Anders
A1 Galinos, Christos
A1 Hermans, Koen
A1 de Vaal, Jacobus Bernardus
A1 Bozonnet, Pauline
A1 Bouy, Ludovic
A1 Bayati, Ilmas
A1 Bergua, Roger
A1 Galvan, Josean
A1 Mendikoa, Iñigo
A1 Sanchez, Carlos Barrera
A1 Shin, Hyunkyoung
A1 Oh, Sho
A1 Molins, Climent
A1 Debruyne, Yannick
AB This paper summarizes the findings from Phase II of the Offshore Code Comparison, Collaboration, Continued, with Correlation project. The project is run under the International Energy Agency Wind Research Task 30, and is focused on validating the tools used for modeling offshore wind systems through the comparison of simulated responses of select system designs to physical test data. Validation activities such as these lead to improvement of offshore wind modeling tools, which will enable the development of more innovative and cost-effective offshore wind designs. For Phase II of the project, numerical models of the DeepCwind floating semisubmersible wind system were validated using measurement data from a 1/50th-scale validation campaign performed at the Maritime Research Institute Netherlands offshore wave basin. Validation of the models was performed by comparing the calculated ultimate and fatigue loads for eight different wave-only and combined wind/wave test cases against the measured data, after calibration was performed using free-decay, wind-only, and wave-only tests. The results show a decent estimation of both the ultimate and fatigue loads for the simulated results, but with a fairly consistent underestimation in the tower and upwind mooring line loads that can be attributed to an underestimation of waveexcitation forces outside the linear wave-excitation region, and the presence of broadband frequency excitation in the experimental measurements from wind. Participant results showed varied agreement with the experimental measurements based on the modeling approach used. Modeling attributes that enabled better agreement included: the use of a dynamic mooring model; wave stretching, or some other hydrodynamic modeling approach that excites frequencies outside the linear wave region; nonlinear wave kinematics models; and unsteady aerodynamics models. Also, it was observed that a Morison-only hydrodynamic modeling approach could create excessive pitch excitation and resulting tower loads in some frequency bands.
SN 1876-6102
YR 2017
FD 2017-10
LA eng
NO Robertson , A N , Wendt , F , Jonkman , J M , Popko , W , Dagher , H , Gueydon , S , Qvist , J , Vittori , F , Azcona , J , Uzunoglu , E , Soares , C G , Harries , R , Yde , A , Galinos , C , Hermans , K , de Vaal , J B , Bozonnet , P , Bouy , L , Bayati , I , Bergua , R , Galvan , J , Mendikoa , I , Sanchez , C B , Shin , H , Oh , S , Molins , C & Debruyne , Y 2017 , ' OC5 Project Phase II: Validation of Global Loads of the DeepCwind Floating Semisubmersible Wind Turbine : Validation of Global Loads of the DeepCwind Floating Semisubmersible Wind Turbine ' , Energy Procedia , vol. 137 , pp. 38-57 . https://doi.org/10.1016/j.egypro.2017.10.333
NO Publisher Copyright: © 2017 The Author(s).
DS TECNALIA Publications
RD 3 jul 2024