This project aims at improving a seakeeping code based on potential theory. It is used to calculate the stationary flow around ships with or without deformation of the free water surface, as well as the periodic flow caused by incident waves and the resulting ship motions and loads. Water is considered as an ideal fluid (invicid, incompressible, irrotational). In both cases the Laplace equation considering the corresponding boundary conditions is solved using a boundary element method (Rankine method) to calculate the velocity potential. For the stationary part, the boundary conditions at the free surface are treated 'fully nonlinear' using an iterative method.

Based on the stationary solution, a perturbation formulation is used for the calculation of the periodical solution for which the boundary conditions are linearised to make computations more efficient in the frequency domain. Validation of the code is based on model tests.

The project is sponsored by GL (Germanischer Lloyd SE)