变壁厚双层药型罩形成复合射流的仿真研究

利用LS-DYNA有限元分析软件,研究典型聚能装药射流与杵体对应初始药型罩的材料分配关系,并依据该分配关系设计了一种新型变壁厚双层药型罩。数值模拟和试验结果表明:利用有效射流与药型罩材料分配关系设计的新型变壁厚铜铝双层药型罩与等壁厚单铜罩形成的射流形态基本相似,但新型变壁厚铜铝双层药型罩形成射流的头部速度达到6 853 m/s,比等壁厚单铜罩射流头部速度提高10.2%。新型铜/铝变壁厚双层药型罩形成射流的性能要优于等壁厚单层铜罩射流的性能。

Simulation on Variable Wall Thickness of The Double-Liner Forming Composite Jet

The finite element software LS-DYNA is used to study the shaped charge jet and slug corresponding to the initial material distribution relationship. Used the distribution relationship to design a new type of variable wall thickness of the double-Liner. The numerical simulation and experimental results show that the jet formation of the new type of Cu-Al variable wall thickness of the double-Liner was similar to the jet formation of the equal thickness single-layer copper liner. But the heed speed of the jet of this new liner was 6853m/s. It was faster than the heed speed of single-layer copper by 10.2%. Compared with the single-layer copper, The jet performance of the new type of Cu-Al variable wall thickness of the double-Liner greatly improved.