Ultimate strength of ship structure and its uncertainty model

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The ultimate strength of ship structures in the damaged as well as intact condition is studied including the uncertainty in the strength. The following achievements were made: (1) The ultimate strength of a continuous stiffened panel with crack damage under combined thrust and lateral pressure were investigated ; (2) The model uncertainty in the prediction of the ultimate longitudinal bending strength of a hull girder using Smith method was quantified ; (3) The Smith method was extended to be applied to the cross section with damages ; (4) ISUM system for the efficient analysis of the ultimate strength of a ship structure with and without damages were developed ; (5) A dynamical model to predict the collapse behavior of a ship hull girder considering the interaction between plastic deformation and fluid forcse was developed and verified by the tank test.