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以K6型单层球面网壳为研究对象,基于非线性有限元理论,研究考虑结构初始几何缺陷、材料非线性以及几何非线性对该网壳结构静力整体稳定性的影响,论述了两类稳定性问题,线性屈曲分析计算得到临界荷载以及屈曲模态,非线性屈曲分析方法为弧长法,分析得到网壳结构的荷载-位移全过程曲线,具有工程实际意义。
Based on the nonlinear finite element theory, the influence of initial geometric imperfection, material nonlinearity and geometrical nonlinearity on the static stability of the reticulated shell structure is studied with K6 single-layer reticulated shell as the research object. The stability problem, the critical load and the buckling mode calculated by the linear buckling analysis, the arc-length method by the nonlinear buckling analysis method, and the whole load-displacement curve of the reticulated shell structure are obtained, which has the practical engineering significance.