Abstract
Toward the application of numerical analysis in evaluating local scouring around offshore wind turbine foundations, a three-dimensional coupled fluid-structure-sediment-seabed interaction model (FS3M) was applied to hydraulic experiments on local scouring around a monopile and suction buckets in Yamano and Furuhata (2022). From a comparison with experimental data, the predictive capability of the model was demonstrated in terms of the nondimensional maximum scour depth, the location of the maximum scour depth, and the location of deposition for the monopile and the suction bucket with diagonal members without openings. The predictive capability was also demonstrated in terms of the location of the maximum scour depth and the location of accumulation for the suction bucket without diagonal members and the suction bucket with diagonal members with openings. However, it was found that there were still issues to be solved in other aspects. This suggested that it is essential to improve numerical accuracy by calibrating physical parameters related to sediment transport.
