A 3D multi-domain high order boundary element method to evaluate time domain motions and added resistance of ship in waves

A Fortran code is originally developed, and is used to simulate wave-body interactions of both the wall-sided and flared hulls including mathematical Wigley-3 hull, Series60, and more realistic hull forms of KCS and S175. Convergence of spatial and temporal discretization, and size of inner domain are detailedly investigated beforehand. Results indicate the present numerical scheme has quite good robustness, and the inner free surface can be reduced to a rather small region comparing to Rankine panel method. The computed hydrodynamic coefficients, added wave resistance and ship motions by MDHOBEM are compared with model test data and results of classic boundary element methods including Rankine panel method, transient Green function method, and translating and pulsating Green function method. It manifests the MDHOBEM has quite good accuracy and needs less computational cost.