ABSTRACT
The finite element (FE) codes have been used to analyze the stress distributions and deformations of very complicated structures with the accuracy demanded in engineering applications under all kind of loading conditions. They are also suitable tools for assessing the ultimate strength of ship structures. The advanced buckling analysis method bases on nonlinear analysis techniques or equivalent, which predict the complex behaviour of stiffened and unstiffened panels (IACS-CSR 2006). The extent of the model used in the buckling assessment is to be sufficient to account for the structure that is surrounding the panel of interest, and to reduce the effect introduced through the boundary conditions. In general, the model is to include more than one stiffener span in the stiffener direction and the portion between two support members in the direction normal to the stiffeners. However, it is not explained what extension of the model is suitable.
