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dc.contributor.authorOng, Muk Chen
dc.contributor.authorBachynski, Erin Elizabeth
dc.contributor.authorØkland, Ole David
dc.contributor.authorPassano, Elizabeth Anne
dc.identifier.citationASME 2014 33rd International Conference on Ocean, Offshore and Arctic Engineering - Volume 9B: Ocean Renewable Energynb_NO
dc.description.abstractThis paper presents numerical studies of the dynamic responses of a jacket-type offshore wind turbine using both decoupled and coupled models. In the decoupled (hydroelastic) model, the wind load is included through time-dependent forces and moments at a single node on the top of the tower. The coupled model is a hydro-servo-aero-elastic representation of the system. The investigated structure is the OC4 (Offshore Code Comparison Collaboration Continuation) jacket foundation supporting the NREL 5-MW wind turbine in a water depth of 50m. Different operational wind and wave loadings at an offshore site with relatively high soil stiffness are investigated. The objective of this study is to evaluate the applicability of the computationally efficient linear decoupled model by comparing with the results obtained from the nonlinear coupled model. Good agreement was obtained in the eigen-frequency analysis, decay tests, and wave-only simulations. In order to obtain good results in the combined wind and wave simulations, two different strategies were applied in the decoupled model, which are 1) Wind loads obtained from the coupled model were applied directly as time-dependent point loads in the decoupled model; and 2) The thrust and torque from an isolated rotor model were used as wind loads on the decoupled model together with a linear aerodynamic damper. It was found that, by applying the thrust force from an isolated rotor model in combination with linear damping, reasonable agreement could be obtained between the decoupled and coupled models in combined wind and wave simulations.nb_NO
dc.publisherASME Digital collectionnb_NO
dc.relation.ispartof33rd International Conference on Ocean, Offshore and Arctic Engineering Volume 9B: Ocean Renewable Energy
dc.relation.ispartofseriesASME Proceedings | Ocean Renewable Energy;OMAE2014-24246
dc.rightsNavngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal*
dc.subjectDynamic responsenb_NO
dc.subjectOffshore wind turbinesnb_NO
dc.titleDynamic responses of a jacket-type offshore wind turbine using decoupled and coupled modelsnb_NO
dc.rights.holderThe authorsnb_NO
dc.relation.projectNorges forskningsråd: 193823nb_NO
cristin.unitnameOcean Engineering

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Navngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse-Ikkekommersiell-DelPåSammeVilkår 4.0 Internasjonal