Wave-Structure Interactions of a Floating FPSO-Shaped Body
Abstract
This study explores wave-structure interactions of a Floating Production Storage and Off-loading (FPSO) model to analyze the wave scatter field around it, based on experiments conducted in the Ocean Basin at Plymouth University's COAST Laboratory. The influence of wave steepness and incident wave direction on wave-structure interactions was examined. Focused wave groups, generated using NewWave with an underlying JONSWAP spectrum, were tested. A phase-inversion method was employed to isolate linear and higher-harmonic components of the free-surface elevation around the FPSO, as well as the mooring line force and model motion response. Results indicate that linear harmonic scattered waves were significantly reduced for the floating model compared to the fixed model. However, second-harmonic scattered waves increased notably near the bow and along the side of the floating model. Higher-harmonic scattered waves increase with increasing incident wave steepness. Additionally, the higher harmonics of mooring line force, heave, and pitch motions also rose with greater wave steepness.
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