Statistics analysis of ship response in extreme seas. (1st June 2016) - Guo, Bingjie
Abstract: Earlier investigations indicate that ship responses may significantly increase in steep sea states and a proper prediction of responses due to extreme waves is important for ship safety in extreme sea. The number of model tests investigating ship responses in rogue waves is limited today while the existing numerical codes predicting ship behavior in these waves still need to be improved. The present study is addressing statistical description of heave and pitch motions and vertical bending moment in extreme sea states by taking an LNG tanker as an example. The statistical analysis on both model tests and numerical simulations with 3D Panel method are performed to verify the numerical approach and to study the effect of forward speed on ship responses in extreme sea. The effect of statistical uncertainty due to different time spans of simulations on ship responses is also investigated. Highlights: Effect of ship forward speed on ship bending moments and motions in extreme sea states Uncertainty analysis on ship responses due to sampling variability Comparisons of nonlinear ship responses in extreme sea states between numerical simulations and model test Statistical analysis on ship responses in extreme sea states