Abstract
Three-dimensional analytical procedures are developed for determining the wave-exciting and motion-induced hydrodynamic forces for fixed and floating ocean structures in a fluid of finite or infinite depth. The fluid potential is expressed by means of a Helmholtz integral, which involves the normal fluid velocities at the fluid-structure interface. Upon discretizing the integral equation by using constant or linear elements and by enforcing the velocity continuity condition at the discrete points of the interface, the fluid potential can be determined. A computer program based on the direct boundary-element method is developed to calculate the wave-exciting and motion-induced hydrodynamic forces. Effects of structural flexibility are not considered in the present paper. Comparisons of the results with those obtained by several previous investigators reveal good agreements.
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