Patent ID: 7756689
Filing Date: 2010-07-13
Classification: G06F,Y02T

Abstract:
1. A computer-implemented numerical method for modeling the motion of a ship interacting with water waves, the numerical method comprising: determining, via a computer, the three-dimensional solid-body rotation of the ship, said three-dimensional solid-body rotation being about the center of mass of the ship, wherein said determining of the three-dimensional solid-body rotation uses a total velocity potential as the sole parameterization and includes calculating the pressure torque and calculating the buoyancy torque, said pressure torque being the torque associated with the total pressure of water on the time-variant wetted surface of the actual geometry of the ship, said actual geometry including the underwater geometry of the ship, said buoyancy torque being the torque associated with displacement of the ship from an equilibrium position in the water; and determining, via a computer, the three-dimensional solid-body translation of the ship, said three-dimensional solid-body translation being of the center of mass of the ship, wherein said determining of the three-dimensional solid-body translation uses a total velocity potential as the sole parameterization and includes calculating the pressure force and calculating the buoyancy force, said pressure force being the force associated with said total pressure of water on the time-variant wetted surface of the actual geometry of the ship, said actual geometry including the underwater geometry of the ship, said buoyancy force being the force associated with displacement of the ship from an equilibrium position in the water; wherein said total pressure of water includes pressure effects, both linear and nonlinear, that are involved in dynamic interaction between the ship and the water.