负泊松比内凹蜂窝圆柱壳水下抗冲击响应研究

Research on underwater impact responses of re-entrant honeycomb cylindrical shell with negative poisson's ratio

基于Abaqus声固耦合法对水下爆炸工况下,负泊松比内凹蜂窝圆柱壳的抗冲击性能进行研究。主要分析双层圆柱壳外壳、内壳和肋板的最大变形、等效塑性应变、动能和内能结果,讨论了不同肋板间距工况对双层圆柱壳抗冲击响应的影响。结果表明,在肋板总重一定条件下,增大肋板间距、增大肋板宽度、减少肋板数量,外壳最大变形、等效塑性应变、动能、内能呈增大趋势;内壳和肋板最大变形、等效塑性应变、动能、内能呈减小趋势。

The underwater impact responses of re-entrant negative Poisson's ratio honeycomb cylindrical shell were simulated based on the acoustic-structure coupling method in Abaqus.The maximum deformation,equivalent plastic strain,kinetic energy and internal energy of the outer shell,inner shell and ribs of the double-layer cylindrical shell were analyzed.The effects of distance of ribs on the anti-impact responses of the double-layer cylindrical shell were discussed.With a cer-tain total weight of ribs,increasing the distance and width of ribs,and reducing number of ribs,the maximum deformation,equivalent plastic strain,kinetic energy and internal energy of the outer shell showed an increasing trend.However,the max-imum deformation,equivalent plastic strain,kinetic energy and internal energy of the inner shell and ribs showed a decreas-ing trend.