轴向冲击下圆柱壳非轴对称屈曲耗散能分析

ENERGY ANALYSIS OF NON-AXISYMMETRIC BUCKLING OF A CYLINDRICAL SHELL UNDER AXIAL IMPACT

主要研究受轴向冲击圆柱壳非对称屈曲耗能,从轴向屈曲变形、环向屈曲变形和轴向压缩变形3个角度进行理论推导.结果表明:环向屈曲变形能随屈曲折叠边数增加有减小趋势,且占总耗能比例很小,可知圆柱壳受轴向冲击屈曲过程中外力做功主要转变为轴向变形能,环向屈曲变形消耗外力功很少.

Cylindrical shells are commonly used components in engineering. The buckling of cylindrical shells under impact load is an important research topic. This paper studies the energy loss in the non-axisymmetric buckling of a cylindrical shell in three aspects： axial buckling, circumferential buckling and axial-compressive deformation. The results indicate that the circumferential deformation energy tends to decrease with the increase of the number of edges, and takes only a small proportion of the total deformation energy. It is concluded that during the process of the axial buckling, most of work done by the external force is converted into the axial deformation energy, only a small part is converted into the circumferential deformation energy.