刚塑性板在柱状炸药接触爆炸载荷作用下的花瓣开裂研究

Petaling of rigid plastic plate under contact explosive loading of cylindrical dynamite

将薄板在接触爆炸载荷作用下的变形分为花瓣开裂之前和花瓣开裂之后两个阶段进行分析。利用Hamilton变分原理得到了花瓣开裂瓣数和花瓣翻转的曲率半径。分析中考虑了系统动能在运动过程中的变化对结果的影响。通过花瓣的旋转曲率半径实现了花瓣动能、弯曲能和断裂能之间的耦合。得到了装药量与破口之间的关系,计算结果与试验结果吻合较好。

Deformation process of rigid plastic thin plate subjected to contact explosive loading of cylindrical dynamite is divided by two phases, namely petaling pre-occurring and petaling post-occurring. The number of petals and the bent radius can be obtained by using Hamilton principle. The influence of change of kinetic energy of petals on the result is considered in analysis. Furthermore, kinetic energy, bending energy and rupture energy are coupled through the bent radius of the petals. Finally, the relationship between the radius of crevasse and the weight of dynamite is described.