Benchmark Study on Numerical Simulation Methods for the Prediction of Parametric Roll of Ships in Waves

The main results and conclusions of an international benchmark study on the performance of computer simulation codes for the prediction of parametric rolling of ships in waves are presented in this paper. The benchmarked codes have been reviewed on a comparative way with respect to the specified benchmark tests and available experimental data. The study ship, a containership, was investigated in semi-captive condition of roll-heave-pitch and for a comprehensive set of sailing conditions in regular, group and irregular waves. The current capabilities of numerical simulation codes in predicting parametric resonance as well as the roll amplitude were assessed. The individual performance of the simulation codes proved divergent, whereas the current state of the art could be assessed on the basis of the best performing methods.