TUMSAS is developed with helpfrom various offshore engineering companies and research institutions toprovide an effective and economical solution for FPSO shallow watermooring. Over stress and even total damage has been reportedfrom applications in the China production field. Submerged soft yoke turret mooring systems are economicaldesigns for shallow water marginal field applications, but they cannot providelong enough FPSO offset.
A conventional catenary turretmooring system is suitable for mid to deep water applications due to itscatenary configuration only can be maintained at a small vessel offset forshallow water. The work presented here includes thedevelopment of TUMSAS and supporting model tests results.įPSOs at 20m to 30m water depth range require nonlinear mooring systems whichcan only provide a soft initial restoring stiffness at small vessel offsets andlarge stiffness at relatively large offsets. Shallow water mooring for an FPSO system is a challenge for offshore engineers.TUMSAS - Turret Mooring with Self Adjusting Stiffness system is invented toprovide a new and effective solution.
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