Strength of Catamaran Ship (2nd Report) : Wave Loads Acting in Connecting Hydrodynamic Interaction Between Twin Hulls

Abstract

The catamaran ship has twin hulls and a connecting deck. When a catamaran ship is in the oblique waves, the connecting deck is subjected to forces and moments due to relative motions of the twin hulls. In the 1st report, the motions of the twin hulls in the various waves were analysed theoretically and it was found that the wave loads in the deck became largest in the transverse waves and the effect of hydrodynamic interaction between twin hulls could not be neglected. Therefore, in this report, considering hydrodynamic interaction between twin hulls, the motions of the hulls in the transverse and oblique waves were analysed. And the effect of variations of the scantling and the stiffness of the deck structure on the relative motions of the twin hulls and the wave loads in the deck were investigated.