Patent ID: 7734449

Claim:
A numerical method for modeling hydrodynamics of a ship and water waves, the numerical method comprising: determining a boundary described by a ship, said determining of said boundary including determining the pressure at said boundary, said determining of said pressure being contextualized in a ship normal vector coordinate system, said ship normal vector coordinate system being a non-Cartesian coordinate system; determining a nonlinear interaction between said ship and incident waves, said determining of said nonlinear interaction including using spectral method; and mutually transforming information between said boundary and said nonlinear interaction; wherein said determining of said pressure includes: establishing a pressure dichotomy of a ship-absent pressure kind and a ship-present pressure kind, said ship-absence pressure kind being characterized by absence of said ship, said ship-present pressure kind being characterized by presence of said ship, said ship-absent pressure kind including a ship-absent pressure p f and a ship-absent modified pressure p*, said ship-present pressure kind including a ship-present pressure p and a ship-present pressure correction Δp, said ship-present pressure p being said pressure being solved for; and obtaining said ship-present pressure p based on said ship-absent pressure p f and said ship-present pressure correction Δp, said ship-present pressure p being defined as the sum of said ship-absent pressure p f and said ship-present pressure correction Δp, said ship-absent pressure p f being related to said ship-absent modified pressure p*; said ship-present pressure p being related to said ship-present pressure correction Δp.