Prediction of Parametric Rolling for a Container Ship in Regular and Irregular Waves Using a Fully Nonlinear Time Domain Potential Flow Method

Paper in proceeding, 2019

In this paper numerical simulations of parametric rolling have been performed. SAFEDOR, an EU funded benchmark study on the capability of different methods to predict such motion, was replicated here, in order to assess the quality of SHIPFLOW MOTIONS for the evaluation of this phenomenon. The code is a fully nonlinear 3D unsteady potential flow method. Since viscosity is not implicitly accounted for by a potential flow method, two different techniques are used here to introduce viscous damping coefficients in the roll motion equation. The results obtained with this method are aligned with the results from the best performing methods analyzed in the benchmark, showing a satisfactory match with experimental results.