SYSTEM FOR DAMPING THE HEAVE OF A FLOATING STRUCTURE

摘要

A damper system (22a-22d) is disclosed which is adapted for damping the heave of a structure (10) floating above the seabed (16) and being subject to oscillatory heave in response to dynamic sea conditions. At least one long riser (20) has a top end (31) and a bottom end that extends from the seabed. A tensioner system (21) suspends the top end (31) of riser (20) from the floating structure (10) so as to allow relative up and down heave therebetween. The tensioner system (21) applies a tension To to the top end (31) of the riser (20). Damper means (22a-22d) is operatively coupled to the tensioner system. The damper means varies the tension on top of the riser (20), thereby exerting damping forces on the floating structure.