荷载组合作用下弹性柱状壳体后屈曲路径的非标准稳定性

外部压力和扭矩作用下柱状壳体的后屈曲路径是不稳定的,大多通过改变结构的几何形状研究稳定性的影响。运用替代法,在不改变结构形状和尺寸的条件下,对其端部施加附加轴向荷载,从而获得结构的后屈曲路径。分别研究了结构在3种力作用下的稳定性:主动力、被动力以及二者相结合。利用ANSYS11.0对不同荷载组合作用下的弹性壳体进行计算。

Non-Standard Stabilization of the Post-Buckling Path for Elastic Cylindrical Shells Under Combined State of Loadings

The post-buckling path for cylindrical shells under external pressure and twisting moment is unstable. The effect of stabilization in most cases is obtained by changing geometry of the structure. In this paper an alternative concept is applied, namely stabilization of the unstable post-buckling path is achieved by application of additional axial loads imposed to the ends of the structure without changing its shape and sizes. Three types of stabilizing forces were investigated: active forces applied to the structure or passive ones or combinations of both. Calculations were performed using ANSYS 11.0 code for elastic shells under different combinations of loadings.