为了评估网栅因素对MEFP命中概率的综合影响,利用LS-DYNA动力有限元程序,采用Lagrangian方法,对网栅切割药型罩形成MEFP的全过程进行了数值模拟。分析了网栅与药型罩的间距、网栅材料和网栅宽度三种因素对MEFP发散角的影响规律。在此基础上以MEFP发散角为命中概率和毁伤概率指标,应用正交优化方法针对三种因素对MEFP发散角影响的主次关系进行了分析研究。结果表明网栅宽度是MEFP发散角的主要影响因素,并得到了影响MEFP发散角的三种因素各水平的最优组合。

In order to evaluate the influence of the bar on the killing probabilities of MEFP, numerical simulation of the process of the liner forming MEFP passing through the cutting bar was carried out with the Lagrangian method using LS-DYNA. The influence laws of the distance between bar and linear, the bar material and diameter of the bar on radial dispersion of MEFP were analyzed in this paper. Regarding radial dispersion of MEFP as index of damage probability on this basis, orthogonal optimization method was applied to analyze the primary and secondary relations of the three factors influencing the radial dispersion of MEFP. The results indicate that the diameter of bar is the main influence factor, and an optimum combination of every level of three factors affecting the radial dispersion of MEFP is gained.