When considering the bomb explosion damage effect, the air shock wave and high-speed fragments of the bomb case are two major threats. In experiments, the air shock wave was studied by the bare explosives superseding the real cased bomb; in contrast, the bomb case influence was ignored to reduce risk. The air explosion simulations of the MK84 warhead with and without the case were conducted. The numerical simulation results showed that the bomb case significantly influenced the shock wave generated by the bomb: the spatial distribution of shock wave in the near field changed, and the peak value of shock wave was reduced. Breakage of the case and kinetic energy of the fragmentation consumed 3 and 38% of the explosion energy, respectively. The increasing factors of the peak overpressure induced by the bare explosive on the ground and in the air were 1.43–3.04 and 1.37–1.57, respectively. Four typical stages of case breakage were defined. The mass distribution of the fragments follows the Mott distribution. The initial velocity distribution of the fragments agreed well with the Gurney equation.

在考虑炸弹爆炸破坏效果时，弹壳的空气冲击波和高速破片是两大威胁。在实验中，用裸炸药代替实弹来研究空气冲击波；相比之下，为了降低风险，炸弹案件的影响被忽略了。对MK84弹头有无外壳进行了空气爆炸模拟。数值模拟结果表明，弹壳对炸弹产生的激波有显着影响：近场激波空间分布发生变化，激波峰值减小。外壳的破裂和碎片的动能分别消耗了爆炸能量的 3% 和 38%。地面和空中裸炸药引起的峰值超压增加因子分别为1.43-3.04和1.37-1.57。定义了四个典型的案例破损阶段。碎片的质量分布遵循莫特分布。碎片的初始速度分布与格尼方程非常吻合。