1990 · 20 citations · 0 references
EngineeringMarine EngineeringOcean EngineeringOffshore EngineeringOffshore StructuresStructural DynamicsMooring SystemsVibration AnalysisCatenary Mooring SystemsDynamic Response Of MooringsDynamic Surface TensionExcitationInertia LoadsMooring DynamicsMooring Line DynamicsMooring Loads
The paper presents two simple and efficient frequency domain methods for the calculation of the dynamic tension of single and multiple segment mooring lines. The first method, MODEL 1, is an analytical approach based on the catenary equations and an estimate of the line drag resistance. To include inertia loads, drag loads and a dynamic description of the mooring line motion, a dynamic system based on a single degree of freedom (SDOF) is developed (MODEL 2). Both methods are extensively tested versus the nonlinear finite element computer program RIFLEX, and the correspondence with respect to dynamic tension amplitudes is very good for a wide range of line configurations, water depths and excitation levels. MODEL 2 is implemented in the MARINTEK positioning computation program MIMOSA 2.