Abstract
Many floating structures in naval architecture and ocean engineering cannot be modelled as a single rigid body. Even for ships, models of interconnected bodies may be necessary for an adequate description of the dynamics. The dynamic behavior of these floating structures is significantly influenced by fluid–structure interactions. So far, most available methods for analyzing these interactions are restricted to single bodies, small wave amplitudes and small body motions, or both. In the present paper, a two-dimensional boundary integral approach with fully nonlinear boundary conditions on the free surface is used to investigate the dynamic behavior of catamarans in nonlinear beam seas. In the model introduced here, the two hulls of a catamaran are connected by elastic beams. Beams and hulls are modelled as multibody systems. The results of numerical simulations are shown for selected configurations.
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