双层金属药型罩战斗部侵彻性能仿真研究

Numerical simulation of efflux performance of double-layer and double-cone charge cover

为使射流具有较好的成型性能,对聚能装药结构进行改进,提出了一种双层双锥的药型罩结构;从影响射流成型的5个因素(药型罩壁厚、上锥角、下锥角、隔板直径、罩顶药高),进行正交优化设计,利用Autodyn软件建立有限元模型,进行数值模拟,得到了16种药型罩结构的射流成型结果,在此基础上开展了射流侵彻靶板数值仿真;结果表明:δ=2 mm,2α_(1)=50°,2α_(2)=65°,d_(g)=110 mm,h_(0)=20 mm,为最佳结构参数,所形成射流与单层单锥药型罩形成射流相比,对靶板的侵彻深度提高9.98%,扩孔口径提高50%。研究结果可以为聚能装药设计和工程应用提供技术支撑。

In order to make the jet have better molding performance,the shaped charge structure was improved,and a double cone shaped charge cover structure was proposed.From the five factors affecting jet forming:the wall thickness of the shell,the upper cone angle,the lower cone angle,the diameter of the baffle and the top charge height of the shell,the orthogonal optimization design was carried out,the finite element model was established by Autodyn software and the numerical simulation was carried out.The jet forming results of 16 kinds liner structures were obtained,and the numerical simulation of jet penetration into the target plate was carried out on this basis.The results show that δ=2 mm,2α_(1)=50°,2α_(2)=65°,d_(g)=110 mm,h_(0)=20 mm are the best structural parameters.Compared with the jet formed by single cone type cover,the penetration depth to the target plate has been increased by 9.98%,and the reaming diameter has been increased by 50%.The research results can provide technical support for the design and engineering application of shaped charges.