辅助药型罩材料对线型聚能射流性能影响的数值仿真

Numerical Simulation of the Effect of Auxiliary Liner Material on the Performance of Linear Shaped Charge Jet

为了提升线型聚能射流的性能,将截顶加辅助药型罩结构应用于线型聚能装药,应用三维有限元分析软件(LS-DYNA)对以紫铜为主体药型罩,Al、Cu和W作为辅助药型罩时形成的线型聚能射流进行了数值仿真,并将其与传统的线型聚能射流进行了对比分析。结果表明:截顶加辅助药型罩结构形成的射流性能更优,并随辅助药型罩材料密度等的增大,射流的延展性、速度及有效质量均有提高,且均优于传统的楔形罩结构;W作为辅助药型罩材料时形成的线型聚能射流,速度较传统的楔形罩结构提高约25.9%,射流的有效长度增加约145%。

To improve the performance of linear shaped charge jet,this study applies the truncated and auxiliary liner structure to the linear shaped charge.The three-dimensional finite element analysis software(LS-DYNA)was used to simulate the linear shaped charge jet formed with copper as the main liner and Al,Cu and W as auxiliary liner.At the same time,comparison between the formed linear shaped charge jet and the traditional jet is performed,indicating that the jet formed by the truncated and auxiliary liner structure has better performance.With the increase of the density and hardness of the auxiliary liner material,the jet s ductility,speed and effective mass are improved and all of them are superior to the traditional wedge cover structure.Compared with the conventional wedge cover structure,the speed and the effective length of the jet utilizing W as the auxiliary material increase about 25.9%and 145%,respectively.