Design and analysis of offshore wind structure

Young-Suk You, Min-Young Sun and Young-Ho Lee

Abstract

The objective of this study was to evaluate the foundation structure of a 3.6-MW wind turbine generator (WTG) installed offshore in Western Korea. The ultimate limit state (ULS) and fatigue limit state (FLS) of the multi-pile steel foundation (MSF) installed at the Saemangeum offshore wind farm were structurally investigated using the finite element (FE) software, ANSYS Workbench 19.0. According to the ULS analysis, no plastic deformation was found in any of the components constituting the substructure. At the same time, the maximal stress value reached the calculation limit of 335 MPa. According to the FLS results, the stress concentration factor (SCF) ranged from 1.00 to 1.88 in all components. The results of this study can be applied to determine the optimal design for MSFs.

Key Words

fatigue limit state; finite element method; multi-pile steel foundation; SMG offshore wind farm; ultimate limit state

Address

Young-Suk You, Min-Young Sun: JBNU International Offshore Wind International Research Institute, Department of EnergyMechanical Design Engineering, Jeonbuk National University, 567 Baekje-daero, Jeonju, Republic of Korea Young-Ho Lee: Department of Mechanical Engineering, Korea Maritime and Ocean University, 727 Taejong-ro, Busan, Republic of Korea

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