DYNAMIC BEHAVIOR OF MOORING LINES ON FLOATING WIND TURBINE

Abstract

 This paper describes results of numerical investigation on dynamic amplifications of fairlead tension using time domain analysis focusing a mooring chain of Floating Wind Turbine in about 100 m water depth. By time domain analysis in which mooring chains are excited by horizontal and sinusoidal displacements at the fairlead with various frequencies, we investigated tension time histories and movements of segments of lines and analyzed dynamic effects associated with the nonlinear damping and added inertia force acting on line segments using simplifying linearised catenary theory , and suggested methods to evaluate the effect of hydrodynamic forces on line tension by using fairlead displacements obtained from quasi- static analysis.