A time-domain strip theory approach to maneuvering in a seaway

• A time-domain body-exact strip theory is developed to predict maneuvering of a vessel in a seaway.
• A translating and rotating frame following the ship, is used to set up the B.V.P for the perturbation potentials.
• A blended method scheme is used to capture nonlinear aspects and maintain computational efficiency.
• A fully nonlinear rigid body equation of motion solver is coupled to the hydrodynamic model to predict ship responses.
• Turning circle maneuvers of containership S-175 have been simulated in calm water and waves.

A time-domain body exact strip theory is developed to predict maneuvering of a vessel in a seaway. A frame following the instantaneous position of the ship, by translating and rotating in the horizontal plane, is used to set up the boundary value problem (BVP) for the perturbation potentials. A boundary integral technique is used for solving the Laplace equation. Linearized free surface boundary conditions are used for stability and computational efficiency, and exact body boundary conditions are used to capture nonlinear effects. A nonlinear rigid body equation of motion solver is coupled to the hydrodynamic model to predict ship responses. Results are presented for the turning circle maneuver of the containership S-175 in calm water and in the presence of regular waves. The results are compared with available experimental results. The simulations are able to capture general qualitative aspects and overall physics of the problem.