Nonlinear Ship Motion Computations Using a Time-Domain Body-Exact Slender-Body Approach

This paper continues the development of a computationally efficient potential flow code using a time-domain body-exact strip theory approach. The exact body boundary conditions and linearized free surface conditions are used. Present results include further improvements, validations, and comparisons. Two different formulations to obtain the forces on the vessel are studied: pressure and momentum. Panel distribution techniques, critical for large amplitude motions, are discussed. The slender-body assumption requires finding the longitudinal interaction between sections to compute the hydrodynamic forces. Finally, an equation of motion solver is implemented to predict the six degree-of-freedom motions of the vessel in regular waves, including nonlinear effects.