Quasi-Static Analysis of the Multi-Component Mooring Line for Suction Anchors

Multi-component taut mooring line is widely used to connect the floating facility to an embedded suction anchor to provide an effective motion limit. The functions of different components should be evaluated in order to optimize its anchoring performance. This paper presents a novel two-dimensional quasi-static model, which can calculate different combinations of line type, taking into account the effects of ocean currents, soil resistance and elastic elongation of mooring line. Accurate analysis is carried out to predict the responses of multi-component mooring line during pretension and in service. Especially, when the floating facility undergoes a series of motion away from its original position, the effect of vertical offset is studied in detail. Finally, based on the presented model, the functions of different components are throughly investigated and some useful conclusions are drawn.