Ultimate strength of ship structure and its uncertainty model

研究了船体结构在完整和损伤状态下的极限强度，并考虑了强度的不确定性。研究了裂纹损伤下连续加筋板在推力和侧压联合作用下的极限强度，量化了Smith方法预测船体梁纵向弯曲极限强度的模型不确定性，将Smith方法推广应用于损伤横截面，建立了基于Smith方法的船体梁纵向弯曲极限强度计算模型，并对该模型进行了数值模拟。（4）建立了船体结构极限强度分析的ISUM系统：（5）建立了考虑塑性变形和流体力相互作用的船体船体梁倒塌动力学模型，并通过水池试验进行了验证。

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.