Research on Motion Response of Soft Yoke Mooring FPSO System

摘要

The motion performance of the soft yoke mooring FPSO system inrnshallow water is investigated. Both numerical simulations andrnexperiments are performed to model the soft yoke mooring of an FPSO.rnA time-domain algorithm based on Cummins impulse responserntechnique is used to calculate the motion prediction of the system. Byrnusing the multi-rigid analysis method, the static restoring force andrndynamic mooring force of the tower-yoke system are analyzed and therndynamic equations of the soft yoke mooring system are obtained. Thernbody motion equations in time domain have been coupled with therndynamic equations of FPSO mooring system. This time-domain methodrnenables adding the environment conditions as to predict the motionsrnand mooring forces on the entire FPSO system. The numericalrnsimulations agree well with the results obtained from the model tests,rnhence this time domain, multi-rigid analysis method is capable ofrnpredicting well the motion performance of a large FPSO in shallowrnwater.