Hydrodynamic interaction of waves with a large displacement floating body

Description

This report describes the analytical method and numerical procedure for the calculation of the wave pressure distribution and resulting induced forces and moments acting on large displacement bodies in the sea. The added mass and damping coefficients for the structure oscillating in all six degrees of freedom is computed. Then, the hydrodynamic coefficients associated with both the wave/structure interaction and the oscillation of the structure are determined by use of a Green's function method using quadralateral elements of constant source strength which applies to large structures of rather general shape. The analysis is based on linear theory and viscous effects are neglected on the basis that the size of the structure is large in relation to the amplitude of the incident wave. Also, the equations of motion for a free-floating body are developed which yields the dynamic response of a floating body with linear mooring line forces. Finally, the computer program capable of carrying out the numerical calculations is outlined and the input/output is discussed in some detail. (Author)

Subjects