摘要
针对非均质炸药的冲击起爆过程,选择以微孔洞弹粘塑性塌缩形成的热点为主的热点形成机制,建立了PBX-9404炸药在冲击波作用下的细观化学反应动力学模型:由于空穴塌缩而发生点火,增长阶段是从内向外的表层燃烧和从外向内的颗粒燃烧。将得到的反应速率模型加入到一维流体动力学程序SSS中,采用遗传算法,建立非线性优化模型,确定了PBX-9404炸药反应速率方程中的参数。利用SSS程序模拟了一维情况下PBX-9404的冲击起爆行为。
A mesomeehanie reaction model of heterogeneous explosives under shock wave was established. In this model, ＂hot spot＂ was formed as a result of the elastie-viseoplastie collapse induced by shock,while the growth stage started from an inner combustion and was followed by an outer surface grain combustion. Then the model was implemented in one-dimensional reactive hydrodynamic program SSS and a genetic algorithm was used to decide the target parameters in the model of reaction rate in PBX-9404.
出处
《含能材料》
EI
CAS
CSCD
2007年第5期464-467,共4页
Chinese Journal of Energetic Materials
关键词
爆炸力学
遗传算法
冲击起爆
反应速率
explosion mechanics
genetic algorithm
shock initiation
reaction rate
