An effective numerical method for solving the linearized time harmonic boundary value problem for the fluid structure interaction of a marine structure of general shape with an incident free surface wave, in restricted waterway, subject to finite water depth, is presented. The method used is based on a formulation, called the hybrid boundary integral equation method, which uses a Rankine source distribution and an eigenfunction expansion in an inner and an outer sub-regions of the fluid domain respectively. The method is then applied to find the hydrodynamic reactive coefficients of added mass and fluid damping, wave excitation forces and motion responses. A hemisphere, an ellipsoid and a ship model are analyzed and compared with corresponding experiments and other predictions. Virtually good agreement exists between experiments and numerical predictions, suggesting the validity of the present method.
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