弹性圆柱壳在轴向应力波传播过程中的非对称屈曲

讨论弹性圆柱壳端部受冲击载荷作用，在应力波传播过程中的非对称屈曲问题。通过求解扰动方程得到了动态屈曲的分叉条件、临界载荷和屈曲模态。数值结果表明，当壳壁厚不很薄时，轴对称屈曲临界载荷比非对称临界载荷高；反之，轴对称临界载荷会比非对称临界载荷低。不同的冲击载荷，屈曲模态也将不同。

NON AXISYMMETRIC BUCKLING OF ELASTIC CYLINDRICAL SHELL UNDER AXIAL STRESS WAVE

In this paper,non axisymmetric buckling of an elastic cylindrical shell,which is impacted on the end by axial step loads,is discussed with the aid of the stress wave propagating.By solving the disturbed equations,the bifurcation condition of the dynamic buckling,critical buckling load and buckling mode are obtained.The results show that when the thickness is not very small,non axisymmetric critical buckling load is higher than axisymmetric one,and that when the thickness is very small,non axisymmetric buckling can occur first.The buckling models dependent on the impact load.