射流击穿靶板后起爆炸药的理论与数值分析

Theoretical and Numerical Analyses of Intoshielded Explosive Detonated by Jet

为了系统地分析聚能射流头部起爆能力随靶板厚度和聚能射流尾部直径的变化规律,以聚能射流击穿屏蔽靶板后对炸药的冲击起爆为研究内容,以准定常侵彻和考虑靶板强度侵彻等理论为研究基础,结合Held起爆准则,构建了聚能射流击穿靶板后冲击起爆炸药的数学模型,并在实验验证模型特性的基础上,利用相关材料参数对模型进行了计算和研究。得出结论:对于锥形聚能射流假设,其最大起爆能力不在头部,所以在判断冲击起爆炸药时,应根据剩余射流的最大起爆能力来判断;增加射流尾部直径可以同比增加聚能射流的最大起爆能力。研究结果可用于聚能射流在导弹主动防御和弹药销毁。

To get the explosion rule of shielded explosive detonated by shaped charge jet,the Held initiating cri-terion and the theory of penetration by quasi-steady fluid dynamics and the penetration theory of considering intensity of target board were applied to establish the mathematics model of shielded explosive detonated by shaped charge jet. To get explosion rule varied with the thickness of target board and the tail diameter of shaped charge jet,the material characteristics and experimentation were used in the calculation and analysis of the model. The obtained results showed that the maximum value of detonating ability was obtained when shaped charge jet was supposed as taper;the ratio of the tail diameter of different shaped charge jet was equal to the ratio of the detonating ability. The important value of research achievement was to supply theoretical guidance for proactive defense and destruction of waste am-munition.