ABSTRACT
This chapter examines the efforts to address the complexity of calculation of extreme loads associated with non-linear finite element structural analysis. Using the non-linear finite element method the hull girder ultimate capacity of container ship is calculated. The common practice in shipbuilding industry to assess hull girder ultimate strength consists of using the Smith method, considering only vertical bending response. Using the Smith method, the moment curvature response of the hull girder at a given cross section may be calculated by integrating load contributions from each individual structural element of the cross section. In oblique sea conditions is expected that torsional and horizontal loads have a significant contribution to the stresses on container ships structure. Special attention is given on ship response in oblique sea under different wave heading angles. A critical collapse mode for container ships is hogging condition in head or following seas where the ship’s double bottom structure is typically under compressive load.
