研究了反应破片战斗部在爆轰驱动下反应破片的加载过程。利用AUTODYN-3D有限元计算软件，针对含能破片战斗部作用的特点，建立了破片抛射速度和主装药、隔爆层、破片等参数的数学模型，模拟了主炸药的起爆、爆轰波的传播、防护材料的作用及对破片的初始驱动过程；通过研究不同防护材料对爆炸冲击波的衰减特性，在满足反应破片抛射初速的前提下保证破片不破坏且有足够的抛射速度；对爆炸驱动过程进行理论分析和数值模拟，验证所设计的防护材料对反应破片的防护性能；对理论计算和数值模拟结果进行比较，并分析各影响因素，结论可为含能破片战斗部结构设计提供依据。

In this paper, the detonation driven process of reactive fragment is studied. The priming of the donor explosive, the spread of detonation wave, the effect of protective materials and the driven process of the fragment are simulated by AUTODYN-3D finite element analysis software. Based on the characteristics of the fragment warhead, a mathematical model is proposed for the relationship between the initial velocity and the structural parameters of fragment projectile including the high explosive charge, explosion-interrupted material, fragments and other components. Based on a study of the attenuation law of the shock wave in different media, the explosion driving process of three typical materials is mainly analyzed. The results show that the shock load in the energetic fragment is significantly decreased by using the interrupted material to ensure no break and reaction in energetic fragments. Through theoretical analysis and numerical simulation, the influence of the shock wave attenuation of the interrupted material on the initial velocity of the energetic fragment is analyzed. A comparison between the theoretical model and the numerical simulation is made. The results provide some insight for the design of the energetic fragment warhead.