Geometric Effect of Bulbous Bows to the Hydrodynamic and the Probability of Slamming on Catamaran

Achieving optimal efficiency, good performance, and cost-effectiveness is the main challenge in ship design. Using a bulbous bow part of attaining an excellent design to reduce drag dynamic load caused by waves slamming. The commonly determined shape geometric based on laboratory testing or computer optimization. This article compares probability slamming into catamaran NPL hull without with bow. Variation its effect hydrodynamics was investigated. study uses numerical method CFD software applies secondary data model same object as another researcher. adjustment led 15.22–17.07% reduction wave drag. According variant, increasing linear parameter length reduces 2,9% In motion analysis bow, heaving pitching are more significant than