A Study on Progress in Antiwave Performance of Mega-Float

摘要

This paper develops designs for some space-saving additional structures in terms of effective reflection or scattering of incident waves at the weather side of Mega-Floats. In order to reduce hydroelastic response in long waves, numerical analyses are carried out taking into account minimization of vertical diffraction force on the edge of offshore Mega-Floats. A model test is then conducted by using an elastic model with additional structures attached, and the effects are validated. However a new problem, enhancement of horizontal motion, is found to arise due to the additional structures, and methods of approach for restraint of horizontal motion are also discussed. The antiwave performance of offshore Mega-Floats is found to have approximately doubled as result of the new designs.