MEFP战斗部结构的正交优化设计

以多爆炸成型弹丸(MEFP)为计算模型,应用显式有限元程序LS-DYNA,分析了药型罩间距、锥角、壁厚、装药高度和装药直径5种因素对MEFP发散角的影响规律。结果表明:随着药型罩间距、壁厚和装药直径的增加以及药型罩锥角、装药高度的减小,MEFP的发散角在减小。在此基础上以MEFP发散角为命中和毁伤概率指标,应用正交优化方法针对5种结构因素对MEFP发散角的影响主次关系进行了分析研究。结果表明药型罩壁厚是MEFP战斗部命中和毁伤概率的主要影响因素,并得到了5种结构因素各水平的最优组合。

Orthogonal Optimization Design on a MEFP Warhead Structure

With Multiple Explosively Formed Projectile(MEFP) simulation model,the law of radial dispersion of MEFP,affected by five factors: liner space、cone angle、thickness of liner、charge height and charge diameter,is analyzed using explicit finite element program LS-DYNA in this paper.The result shows that: with the increasing of liner space,thickness of liner and charge diameter,and the decreasing of cone angle of linear and charge height,the radial dispersion of MEFP decreases. Regarding radial dispersion of MEFP as index of damage probability on this basis,orthogonal optimization method is applied to analyze the primary and secondary relations of affecting the radial dispersion of MEFP on the five factors.The results indicate that thickness of liner is the main influence factor,and optimum combinations of every level of five factors are gained.