Advanced Physical Research

This study investigates the hydrostatic stability and hydrodynamic response of a deep-draft droplet-shaped floating offshore wind platform designed for a 5 MW turbine system. The geometry combines a narrow keel region with an enlarged upper section, producing a low center of gravity and reduced waterplane area. A three-line catenary mooring system was considered for deep-water conditions (1000 m). Frequency- and time-domain analyses were performed to evaluate added mass, radiation damping, response amplitude operators (RAOs), and mooring tension dynamics under irregular JONSWAP wave conditions. The platform exhibited strong static stability with a metacentric height of approximately 13.2 m. The heave response remained non-resonant over the investigated wave-frequency range, while the dominant pitch response reached approximately 3.65°/m near T ≈ 21.7 s. Time-domain simulations yielded limited motion amplitudes (σ_z ≈ 0.79 m; σ_pitch ≈ 1.91°) and moderate dynamic amplification factors (DAF ≈ 1.43). The results indicate that the proposed deep-draft configuration provides stable hydrodynamic behavior and effective redistribution of wave-induced loads for floating offshore wind applications.