中厚圆柱壳在局部荷载下有限变形与屈曲分析

在柱壳的有限元计算中，采用Mindlin八结点杂交壳单元和增量荷载法，基于选择积分，缩减积分及完全积分三种积分模式编制了分层计算各种厚度板壳的有限元程序FEAM，并对中厚圆柱壳在局部法向均布荷载作用下的弹塑性有限变形和屈曲问题进行了分析和计算，算例表明，利用FEAM可对壳体屈曲的临界荷载及屈曲后结构的承载与形状改变作定性与定量的分析.

Analysis for Buckling of Finite Deformation on Moderately Thick Cylindrical Shells Subjected to Local Loads

Based on selected (reduced or full) integration, eight nodes heterosis and incremental loading method were adopted during FEAM engineering calculation for shells. By using the Layered approach the finite elements program FEAM was authorized to analyze the deformation of shells whose thickness is variable. In the end , the buckling of finite elasto-plastic deformation on moderately thick cylindrical shells subjected to local normal uniformly distributed loads was analyzed and calculated. By FEAM, it can give a qualitative and quantified analysis for confirming critical buckling loading and observing the change of ability of the loadbearing and the change of deformed configuration after buckling.