摘要
采用拟协调元方法推导了等腰梯形薄壳元的显式几何刚度阵，用于组合结构屈曲分析的计算，结果表明，这种单元的几何刚度阵收敛快、精度好。
The explicit geometric stiffness matrix of trapeziodal element is presented by means ofthe method of quasi-conforming elements. Computing results of elastic buckling analysis ofsome examples show that this element has higher accuracy and faster convergence.
基金
国家自然科学基金
关键词
屈曲
有限元
几何刚度阵
旋转壳
工程力学
buckling
finite element method/geometric stiffness matrix
quasi-conforming trapeziodal element
