On ships, cruciforms are girder intersections that possess significant resistance to indentation during collision and grounding. Hence, an understanding of the energy that is absorbed by the cruciform during accidents is important. In this study, the crushing resistance of the individual cruciforms is analysed by using a non-linear finite element program LS-DYNA. The results are compared with existing plastic analytical formulas and experimental data in the literature. On the basis of scrutinisation of the internal energy, an effective width for the cruciform is proposed and applied to the ship's girder with realistic boundary conditions and real striking structures. The energy dissipation of the cruciform at the girders’ intersection that is subjected to a flat indenter and a large radius rigid bow shows a difference of less than 6% in comparison with the analytical formula for a single cruciform. The deviation increases as the radius of the bow decreases. The material's fracture also has a moderate influence on energy dissipation in the analysed case. By adopting the proposed concept of the cruciform's effective width, the internal energy that is absorbed by the ship structure during the collision and grounding can be estimated accurately using an analytical method.
Crushing resistance of a cruciform and its application to ship collision and grounding
Ships and Offshore Structures ; 7 , 2 ; 185-195
2012-06-01
11 pages
Article (Journal)
Electronic Resource
Unknown
Crushing resistance of a cruciform and its application to ship collision and grounding
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