含凹陷损伤FPSB典型加筋板剩余极限强度研究

本文选取一型FPSB典型加筋板结构,在考虑初始缺陷的情况下采用非线性元法,通过对比研究,选定了(1/2 1 1/2)的加筋板模型以及合适的边界条件、网格尺寸。分别研究了三种不同凹陷形状对加筋板极限强度的影响,选定了以弧形凹坑为主要研究对象的凹陷形式。分别研究了凹陷损伤加筋板随凹痕深度、凹痕长度、凹痕宽度、凹痕位置变化时结构在单轴受压情况下的极限强度变化情况。本文的计算结果可对此型FPSB加筋板结构在凹陷损伤后的极限强度评估提供一定的参考。

Ultimate strength analysis of a kind of typical stiffened Panel with damage of a FPSB

The nonlinear finite element method was used to study a type of stiffened plate with initial distortion imperfections of a FPSB hull girder. By comparative study, the one bay model (1/2 1 1/2) is chosen for the ultimate strength study, suitable boundary conditions and mesh size were also decided in this paper. Besides, the ultimate strength of stiffened plates with three types of damage shape were studied respectively, by which arc-shaped damaged was confirmed as the main study object. The ultimate strength under uniaxial axial compression with the change of damage depth, damage length, damage width, damage location were also researched. The results of this paper can be used to as a reference when evaluate the residual ultimate strength of the stiffened plate of this FPSB hull girder.