静水外压环肋圆柱壳非弹性总体屈曲分析

General Inelastic Buckling of Ring stiffened Cylindrical Shells Under Hydrostatic Pressure

给出环肋圆柱壳在静水外压下非弹性总体屈曲和后屈曲分析增量形式的Ｋａｒ－ｍａｎ－Ｄｏｎｎｅｌ型方程并采用作者建议的奇异摄动解法进行求解．本构关系采用形变理论，壳体的非弹性状态由边界层外部的均匀应力状态确定．算例表明，本方法能够比较准确有效地分析环肋圆柱壳在静水外压下非弹性总体屈曲和后屈曲．

This paper derives the incremental inelastic Karman Donnell equations of nondemensionalized nonlinear boundary layer type for the analysis of ring stiffened cylindrical shells under hydrostatic pressure,in which the J 2 deformation theory is adopted and the inelastic state of the shells is determined based on the uniform stress outside the boundary layer.The equations are solved by using the singular perturbation method proposed by the authors.It is demonstrated,based on the calculating examples of ring stiffened circular cylindrical shells,that the present method is of high computing efficiency and accuracy.