Numerical studies on CALM buoy motion responses and the effect of buoy geometry cum skirt dimensions with its hydrodynamic waves-current interactions

An essential aspect of Catenary Anchor Leg Moorings (CALM) buoy structures are the components hydrodynamics like waves, underwater current, and wind. In this study, numerical investigations on CALM were carried out. Firstly, motion study free-floating was conducted in ANSYS AQWA. Then an Orcaflex-coupled model system with submarine hoses Lazy-S configuration, presented. It attached to six mooring lines under 100 m water depth. Two types geometries have been investigated: Square Buoy (SB) Cylindrical (CB). Different cases same widths considered using three skirts at 13.90m, 12.90m, 11.90m. Diffraction analysis used obtain behaviour. Results responses degrees freedom (6DoF) surge heave motions, response amplitude operators (RAOs), radiation damping, added mass, also The geometry skirt both influence its hydrodynamics. successfully achieved good reports characteristics wave-current interaction (WCI) for buoys.