多元混合PBX炸药冲击起爆的多元Duan-Zhang-Kim反应速率模型研究

提出了多元混合PBX炸药孔隙塌缩热点模型新的处理方法，构建了新的细观反应速率模型，系列数值模拟结果与实验结果均一致，表明该细观反应速率模型可较好地描述和预测炸药组分配比及颗粒度对多元混合PBX炸药冲击起爆过程的影响。PBX炸药冲击起爆过程主要受热点点火过程和燃烧反应过程共同作用:HMX占主导成分的PBXC03炸药，起爆压力低，冲击起爆过程受热点点火影响较明显，热点点火后的燃烧反应速度较快，表现为加速反应特性；TATB占主导成分的钝感PBXC10炸药，起爆压力高，冲击起爆过程主要受点火后的燃烧反应过程控制，且点火后燃烧反应速度较慢，表现为稳定反应特性。

A multi-component Duan-Zhang-Kim mesoscopic reaction rate model for shock initiation of multi-component PBX explosives

This paper offers a new method for calculating the reaction rate of the pore collapse hot-spot ignition in multi-component PBX explosives, and proposes a new mesoscopic reaction rate model capable of describing and predicting the shock initiation and detonation behavior of multi-component PBX explosives with any explosive components proportion as well as any explosive particle size. The pressure-time histories in the explosive samples calculated using this mesoscopic reaction rate model are in good agreement with the experimental data. The shock initiation and detonation process of PBX explosives is mainly controlled by both the hot-spot ignition processes and the combustion reaction processes. The PBXC03 explosive with the dominant component of HMX is mainly controlled by the hot-spot ignition and shows the accelerated reaction characteristics. With the dominant component of insensitive TATB, the critical initiation pressure of PBXC10 is high and the shock initiation behavior is controlled by the combustion reaction process, which shows a stable reaction characteristics.