复合壳体对炸药抗破片冲击起爆影响研究

Influence on shock initiation of composite shell charges underthe impact of fragments

主要针对复合壳体对炸药抗破片冲击起爆的防护问题,基于仿真和实验结果可行性校验基础上,开展了不同复合壳体对炸药层内压力峰值、能量变化等影响特性研究。通过不同中间层复合壳体方案的对比可知,低波阻抗复合壳体(钢-聚脲树脂-钢)可使炸药层压力峰值大幅下降为单一钢壳体的36%;结果同时表明中间层材料比强度越高,抗破片侵彻和吸能性能越强;改变复合壳体排列顺序,将聚脲树脂作为壳体内衬时,炸药层峰值压力仅为单一钢壳体的30%,传入炸药层的能量比单一钢壳体降低近一个数量级;当复合壳体厚度与单一钢壳体相同时,钢-聚脲树脂复合壳体中炸药的峰值压力降为单一钢壳体的64%,传入炸药层的能量减少约一半。由此可见复合壳体显著降低了破片作用下炸药层的峰值压力和传入炸药的能量,可有效提高炸药抗破片冲击起爆的能力。研究结果可为复合壳体用于炸药抗冲击起爆的设计与分析提供重要参考。

The shock initiation of composite shell charges under the impact of fragments was studied.Simulations were compared with experimental results.The research on the pressure peak and energy change of the explosive in the protection of the different composite shell was carried out.By comparing different configurations,it was obtained that the pressure peak of the explosive in the protection of the composite shell with low wave impedance of the interlayer material reduce to 36%of that obtained from single steel shell.And the result also shows the higher strength and modulus of the interlayer material,the better performance of against penetration of fragments and energy absorption of the composite shell.By changing the arrangement of composite shell,placing the SPUA near the explosive,the pressure peak of explosive is 30%of the single steel shell,and the absorption of energy is a magnitude lower than that of the single steel shell.With a certain thickness of the composite shell,it is found that the pressure peak of the explosive of the steel-SPUA shell is 64%of the single steel shell,and the energy transmitted into explosive is half of the single steel shell.Therefore,the composite shell reduces pressure peak and the energy transmitted into composition B significantly,and improves the ability of explosives against shock initiation of fragments.