As the importance of offshore wind power grows for carbon neutrality, the high operational cost of Wind Turbine Installation Vessels (WTIV) has become a major factor increasing the Levelized Cost of Electricity (LCOE). To address this, this study eval...
As the importance of offshore wind power grows for carbon neutrality, the high operational cost of Wind Turbine Installation Vessels (WTIV) has become a major factor increasing the Levelized Cost of Electricity (LCOE). To address this, this study evaluates the structural safety of a jacking system for an integrated installation substructure capable of installing and maintaining 10MW fixed offshore wind turbines without WTIVs. Based on DNV regulations, ten design load cases were derived, considering operations such as raising, holding, and lowering of the pontoon substructure, as well as severe storm conditions. Finite Element Analysis (FEA) was performed to analyze the stress and deformation behavior of the jacking system under each load case. The results showed that the maximum von-Mises stress in all load cases satisfied the allowable stress criteria defined by the classification society rules. Specifically, sufficient safety margins were confirmed even under the most severe conditions: the lowering operation with full ballast (LC-9) and the storm survival condition (LC-10). Therefore, the jacking system designed in this study is verified to have structural integrity suitable for the integrated installation and operation of 10MW offshore wind turbines.