Recently, the size of offshore wind generators and blades are increasing for more efficient energy production. Larger offshore wind turbine foundations are also required for higher vertical and lateral capacities against significant loads and bending moments. In addition, construction costs have become serious issues for developing offshore wind farms in Korea because of critical soil conditions and insufficient supply-chain for construction. Thus, the reduction of LCOE (Levelized Cost of Energy) has been highlighted in Korean market. This has obviously led to the motivation for developing a new substructure system for this purpose. This study investigates the effect of soil conditions on the foundation penetration behavior using centrifuge model tests, ISO (2016), InSafeJIP and numerical analysis using the software ABAQUS. The penetration for installation and vertical and lateral behavior for operation of the foundation was analyzed using ISO (2016), SNAME (2018) and LPile program 2013. This study showed that guidelines and test results showed quite similar penetration behavior. Additionally, lateral pile deflection of the legs will not occur significantly in this substructure, but it is necessary to check the structural stability of jack-up units.
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Lee et al. (2024) studied this question.
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