碟形薄壳的塑性屈曲

Plastic Buckling of Torispherical Shell

本文采用非线性前屈曲一致理论分析均布外压下碟形薄壳的塑性屈曲问题，建立了这类壳体的能量表达式和屈曲方程，给出了简明的计算格式。数值分析结果表明，所导出的算法具有较好的精度，计算过程也简单方便。

The torispherical shell is a shell of revolution, which consists of spherical shell and a hoop shell, it is often used in engineering as a head of vessels and submarine, and comPOnent of missiles. The shell must bear uniform external pressure and buckling is one of main forms of collapse. This paper uses the nonlinear prebuckling consistent theory to analyse the plastic buckling of this kind of shell, the calculation formula is presented on the energy principle. Numerical examples show that the method in this paper has better precision and calculating process is very simple.