The main purpose of this work is to study a two dimensional coupled analysis, in vertical and lateral directions, of the dynamic behavior of a seawater intake riser (SWIR). The dynamic solution is performed in time domain, through the time integration Newmark-beta method, and the use of the Newton Raphson method to solve the nonlinearity problem. A finite element computational method is deployed to have a better understanding of the vertical motion contribution in the overall system, taking into account the environmental loads (wave) and the heave motion of the FLNG vessel.

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