In order to study the influence of shell thickness, detonation velocity, and initiation point position on the average flight angle of axial prefabricated fragments, numerical simulation of the accelerated process of the axial prefabricated fragments was carried out with the Lagrange method using LS-DYNA. Regarding average flight angle of fragments as index , orthogonal optimization method was applied to analyze the primary and secondary relations of the three factors influencing the average flight angle. The result indicates that shell thickness is the dominant factor, explosive detonation velocity comes second, and initiation point distance impact is minimal. An optimum combination of every level of three factors affecting the average flight angle is gained, through which the corresponding fragments average flight angle is 4. 520°.%为了研究壳体厚度、炸药爆速、起爆点距离3种因素对轴向预制破片战斗部平均飞散角的综合影响,利用LS-DYNA动力有限元程序,采用Lagrange算法对轴向预制破片战斗部的加速过程进行了数值模拟.以破片平均飞散角为指标,应用正交优化方法针对3种因素对破片平均飞散角影响规律和主次关系进行了分析.结果表明,壳体厚度是主要影响因素,炸药爆速次之,起爆点距离影响最小；并得到了影响破片平均飞散角的3种因素各水平的最优组合,优化之后对应的破片平均飞散角为4.520°.
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