充有弹性介质多层复合材料圆筒壳稳定性

THE STABILITY OF THIN LAMINATED CIRCULAR CYLINDRICAL SHELLS CONTAINING AN ELASTIC CORE

本文分析了充有弹性介质的多层复合材料圆筒壳在轴压、侧压与水压作用下的稳定性。所采用的方法是用Galerkin—差分法求介改型的Donnell方程,再根据稳定准则确定临界值。若干算例已在文中列出。计算结果表明:内部介质材料性能和壳体的边界条件对临界载荷有较大影响。本文采用的分析方法和结论可供固体火箭发动机壳体设计工作者参考。

The stability of thin laminated circular cylindrical shells with clastic core under uniform axial compression, lateral pressure and hydrostatic pressure are analyzed. The Galerkin-difference method is used to simplify the modified Donnell equation into linear equations. Then according to the stability criterion, the critical loads can be found. Some examples are present. The results have shown that the material behavior of the core and the boundary conditions of shell have a great effect on stability. The method appears to be worth recommending, especially while designing solid propellenters.