为使模拟弹爆炸驱动后形成大小均匀、飞散合理的破片群,对模拟弹弹体采用预制破片技术。利用LS-DYNA有限元计算程序和破片初速经验理论公式,得到破片飞散的初速、破片沿着轴向的速度分布和破片向前、向后的飞散角度,并设计模拟弹进行靶场试验验证。结果表明:数值模拟结果与试验结果近似一致,且采用预制破片技术对弹体改性后形成的破片较均匀。 In order to make the simulated bomb explosion driven to form a uniform size, scattered reasonable fragments, simulation of projectile body using prefabricated fragment technology. Using the LS-DYNA finite element program and the empirical formula of rupture velocity, the velocity of rupture of rupture disk, the velocity distribution of rupture along the axial direction and the scattering angle of rupture forward and backward were obtained. The results show that the numerical simulation results are in good agreement with the experimental results, and the fragments formed by modified projectile are more uniform.