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Group of Marine Dynamics and Hydrodynamics > 2.1 Dynamics of Moored Floaters > Publications
Mohapatra, S.C., Guedes Soares, C. and Belibassakis, K. (2024), Current Loads on a Horizontal Floating Flexible Membrane in a 3D Channel, Journal of Marine Science and Engineering, Vol. 12, 1583.
A 3D analytical model is formulated based on linearized small-amplitude wave theory to analyze the behaviour of a horizontal, flexible membrane subject to wave-current interaction. The membrane is connected to spring moorings for stability. Green's function approach is used to obtain dispersion relation and is utilized in the solution by applying the velocity decomposition method. On the other hand, a brief description of the experiment is presented. The accuracy level of the analytical results is checked by comparing the results of reflection and the transmission coefficients against experimental data sets. Several numerical results on the displacements of the membrane and the vertical forces are studied thoroughly to examine the impact of current loads, spring stiffness, membrane tension, modes of oscillations, and water depths. As the value of the C.S. rises, the deflection also increases, whereas it declines in deeper water. On the other hand, the spring stiffness has minimal effect on the vibrations of the flexible membrane. When vertical force is considered, higher oscillation modes increase the vertical loads on the membrane, and for a mid-range wavelength, the vertical wave loads on the membrane grow as the C.S. increases. Further, the influence of the phase and group velocities are presented. The influences of current speed (C.S.) and comparisons between them in terms of water depth are presented and analyzed. This analysis will inform the design of membrane-based wave energy converters and breakwaters by clarifying how current loads affect the dynamics of floating membranes at various water depths.
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