Collision Analysis and Residual Longitudinal Strength Evaluation of a 5 MW Spar Floating Offshore Wind Turbine Impacted by a Ship

As an emerging energy transition form, many floating offshore wind turbines are expected to be located far away from the coast of Ulsan, South Korea. Due unintended ship’s berthing mistake which could occurred because huge traffic for installation and maintenance purpose within farm, however, spar-type substructure impacted by a ship collision residual strength damaged structure reduced. In this work, finite element analysis circular tube subjected impact loading was performed compute permanent deformation after in ABAQUS numerical results were validated with experimental data. The approach further expanded application calculate damage 5 MW turbine ship, then longitudinal calculation implemented evaluate based on relation between increase bending moment corresponding curvature. Under case 3 m/s speed floater, evaluation showed 4.1% reduction strength, used as basis assessment O&M service providers whether can safely towed or maintained on-site safety.