PBX-9404的化学反应速率方程及起爆特性

通过对炸药化学反应速率方程的分析，建立了基于Kim弹粘塑性球壳塌缩热点模型原理的三项式化学反应速率方程模型。运用遗传算法确定了反应速率方程相关参数，通过与Forest-Fire反应速率模型数值模拟结果的对比对所建模型的合理性进行了验证。将所建反应速率方程模型嵌入有限元程序对PBX-9404炸药起爆过程进行数值模拟，根据模拟结果分析了炸药遭受冲击加载后炸药孔隙率、颗粒尺寸等变化对炸药冲击起爆过程的影响。

Study on new reaction rate function model of PBX-9404 for damaged explosive initiation behaviour

A new reaction rate function model was developed to represent explosive initiation process based on Kim elastic-plastic pore collapse hot spot reaction model by analyzing explosive reaction rate function models. Parameters of the developed reaction rate function model were determined by using genetic algorithms as well as one dimensional Lagrangian shock to detonation pressure curv The new model was validitied by comparision of simulation results between the new model and the Forest-Fire reaction rate function model. PBX-9404 shock initiation and detonation process was numerically simulated by embedding the new reaction rate function model into finite element analysis program. Influences of porosity and grain size change on initiation and detonation behaviours of explosive were analyzed by the numerical simulation results in the event that explosive was loaded by applied shock.