An efficient numerical method for solving '2.5D' ship seakeeping problem

This paper describes a new numerical algorithm for solving 2.5D hydrodynamic theory, which is based on the high-speed slender body assumptions where the free-surface condition is 3D but the control equation and body surface condition are 2D. This numerical algorithm is accomplished using boundary integral equations formed in the inner fluid field domain and outer fluid field domain and matched on a fixed control surface. Theoretically predicted vertical hydrodynamic coefficients by this method is verified by the theoretical results computed by 2.5D theory based on time domain boundary integral equations. This paper also shows that the matched boundary integral equations can be used to calculate the hydrodynamic characteristics of high-speed displacement vessels with a large flare.