轴向冲击下圆柱壳非轴对称屈曲耗散能分析

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.

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

Cylindrical shells are commonly used components inengineering. The buckling ofcylindrical shells under impact load is an important research topic. This paper studies the energyloss in the non-axisymmetric buckling of a cylindrical shell in threeaspects: axial buckling, circumferential buckling and axial-compressivedeformation. The results indicate that the circumferential deformation energytends to decrease with the increase of the number of edges, and takes only asmall proportion of the total deformation energy. It is concluded thatduring the process of the axial buckling, most of work done by the external force isconverted into the axial deformation energy, only a small part isconverted into the circumferential deformation energy.