Comparative calculation on damping contribution of different mooring types to deepwater floating platform

Mooring damping provides important contribution to the motion response of deepwater floating platform. The dissipated energy by a mooring line from the floating platform as a result of its oscillation is applied to calculate the mooring-induced damping. The quasi-static method and nonlinear dynamic finite element in time domain method are introduced, respectively. Three types of mooring systems, which are catenary, semi-taut, and taut, have the similar static restoring force characteristics. The calculations on damping contribution of the three mooring types are compared. The results give the scope application of different calculation methods on mooring damping, and summarize the damping contribution of different mooring types.