Finite element analysis of amidships compartment of monohull research vessel

Abstract

The finite element simulation results of the monobull amidships subjected to vertical bending moment are presented. The simulated structures are made of aluminum alloy 5083 Hl 16, 6061 T6, 6082 T5, mild steel S235, high tensile steel S355 of nominal ultimate stress reinforced with extruded part of the same material. Besides that, two cases with hull using aluminum alloy 5083 H 116 combine with extruded part using aluminum alloy 6061 T6 and 6082 T5 respectively were also generated. The bending moment curvature curves are presented covering the ultimate bending moment of sagging and hogging analysis of each case with the deflection of each model at the ultimate bending moment has been predicted. The study was also including the comparisons of all cases regarding to the ultimate bending moment, maximum stress distribution at the model local penal and the model global ultimate strength. In the final part of the study, the modes of collapse for each model's keels and center girder are discussed. The concept is very useful to identify the governing parameters affecting the ultimate strength of 30 structures under predominant bending moment.