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For a special arrangement of multiple floating bodies, it is known that body-generated waves will be confined inside of the bodies due to hydrodynamic interactions; which is referred to as 'cloaking' phenomenon. In order to study this phenomenon in more detail and its application to engineering problems, we have developed an accurate computer code and an optimization scheme using GA (genetic algorithm) and presented some results for the diffraction problem. In the present paper, the floating body to be cloaked is assumed to be freely oscillating in regular waves and multiple bodies surrounding the central body are assumed to be controlled with an external dynamic system with damping and restoring forces. Study is made on the energy conservation relation and the scattered and radiation wave patterns when the cloaking is realized and also on the absorption of wave energy through the work done by the external force of damping installed in the surrounding cylinders. [ABSTRACT FROM AUTHOR]

The article discusses research which examined the wave pattern in cloaking phenomenon acting on a body surrounded by multiple vertical circular cylinders. Topics discussed include the hydrodynamic interactions related to the phenomenon, optimization of the geometrical parameters surrounding circular cylinders and the reduction of the wave drift force to zero.