Transient Responses Evaluation of FPSO with Different Failure Scenarios of Mooring Lines

During the long-term service condition, mooring line of deep-water floating platform may fail due to various reasons, such as overloading caused by an accidental condition or performance deterioration. Therefore, safety under transient responses process should be evaluated in advance, during design phase. A series time-domain numerical simulations for evaluating changes a Floating Production Storage and Offloading (FPSO) with different broken modes lines was carried out. The conditions include single two failure ipsilateral, opposite, adjacent sides. resulting following steady-state vessel tensions were analyzed, corresponding influence mechanism investigated. watch circle tension redistribution remaining lines. results indicated that mainly influences sway, surge, yaw, change rule is closely related stiffness symmetry system. simulation could give profound understanding transient-effects failure, suggestions are given account effects