Numerical simulation of intact stability analysis of a catamaran vessel

This research work shows the intact stability analysis of a passenger catamaran vessel considering their different load cases: Fully loaded ship to maximum free-board draught; lightship with full tanks; and lightship with no passengers, crew, and empty tanks. The MAXSURF package as the Naval Architecture tool was selected to model the catamaran hull form design using the MAXSURF modeler and the MAXSURF stability was employed to carry out the stability analysis. The stability analysis was conducted using the intact stability criteria of IMO. The stability assessment was performed to verify whether the vessel's stability complies with international standards. A numerical method (Simpson’s rules) was employed in evaluating the area under the GZ curves within the range: 0º - 30º; 0º - 40º; 30º - 40º. The maximum heeling moment was calculated as 954.48 tons-m for load case 1; 755.36 tons-m for load case 2; 671.58 tons-m for load case 3 and the range of stability for all three load cases was justified well. It was concluded that the Catamaran at full load (Load case 1) is more stable with a maximum heeling moment of 954.48 tons-m as compared to Load cases 2 and 3