Hydrodynamic comparison of two catamarans and INCAT vessel in terms of vertical acceleration and slamming

In the present paper, a catamaran vessel was designed and constructed in two models of without and with (INCAT vessel) bow and has been experimentally investigated in environments with two significant wave heights of 11 cm and 17 cm. The slope of bow and its position were evaluated to have the lowest vertical acceleration. The results show that in the absence of slamming phenomenon, the vertical acceleration and the values of the pitch and heave are reduced and its motions becomes more stable despite the increase of the resistance force. However, in the presence of the slamming phenomenon and the resulting vibrations that occur at the environment with significant wave height of 17 cm, although the acceleration and the values of the pitch and heave are reduced, the increase of the resistance force has an undesirable effect on the vessel motion.