接管弯矩与外压作用下薄壁圆筒的失稳分析

Stability Analysis of Thin-Walled Cylindrical Shell with Nozzle Subjected to Moment and External Pressure

本文采用考虑初始几何缺陷的弹塑性应力分析方法对某带薄壁圆筒进行了非线性失稳分析,结果表明:开孔接管大大降低了薄壁圆筒失稳临界载荷;随着接管弯矩的增大,圆筒临界失稳载荷有一定程度减低,并且圆筒的临界变形有整体失稳波形向接管局部失稳转变。

The nonlinear stability analysis of a thin-walled cylindrical shell with nozzle is carried out using elastic-plastic stress analysis considering initial geometry imperfection. The results show that the nozzle largely reduces the critical buckling load of the thin-walled cylindrical shell;The buckling loads decrease when the nozzle moment increase, and the buckling modes transform from total deformation to local deformation.