复合受力作用下的板格和加筋板的极限强度计算与研究

Calculation and Research on Ultimate Strength of Panels and Stiffened-plates under Combined Loads

通过非线性有限元对板和加筋板在承受复合受力作用时的极限强度做计算和研究,讨论了非线性有限元计算中板和加筋板的边界条件及初始变形的实现,单元尺寸的选定,边界条件的施加,多载荷步的非线性求解等技术问题.分别选取了一块板格和加筋板作为研究对象,对多种复合载荷形式下的板和加筋板的极限强度进行了计算分析.计算结果表明,在非线性有限元计算中的处理方法是正确、有效的,计算结果与参考值吻合良好.

This paper mainly do the calculation and research on the ultimate strength of panels and stiff enedplates under combined biaxial compressions and lateral pressure based on nonlinear FEM. It fo cused on the applying of the initial imperfection of the plate and stiffenedplate, and also on discussing the element size, boundary condition, multiload step for nonlinear FEM solution. The paper has car ried out the ultimate strength calculation for a panel and a stiffenedplate under various combined bi axial compression and lateral pressure. It is showed that the procedures taken in this paper is correct and effective, and the results are agreed well with other references.