ABSTRACT

The damping coefficients of solid and porous disks in the context of their use as heave dampers in offshore structures was experimentally studied in the paper of Vu et al. (2004). Results for a solid disk agreed reasonably with previously published data, but the agreement with porous disks showed some discrepancies which need to be studied further. Damping coefficients for all disks were found to increase linearly with increasing amplitude of oscillation. The experimental work of He et al. (2007) focused on the damping coefficients parametric dependence on KC number and geometric dependence (thickness-to-diameter ratio).