Since the hull structure was slightly unsymmetrical to centre line, both starboard and port halves were modelled. Four-noded shell elements were used for modelling all decks, walls, bulkheads and outer shell. Stiffeners, girders and pillars were modelled with two-noded beam and 2-noded truss elements. All structural members (i.e. hull shell, decks, watertight and partial bulkheads, engine casing, and ramps) were included in structural model so that the flexible hinge characteristic was ensured. Fig. 5 (left) shows POSEIDON model of the midship of the mentioned car carrier, Fig. 5 (right) the export version of the POSEIDON model of Frame 90 midship area to ANSYS.