PBX炸药二维冲击起爆机理的数值模拟  

Numerical Simulation of Two Dimension Shock Initiation and Detonation Behavior of PBX

作　　者：梁增友[1] 黄风雷[2] 张振宇[3] 王辉[1] 

机构地区：[1]中北大学机电工程学院,山西太原300051 [2]北京理工大学爆炸科学与技术国家重点实验室,北京100081 [3]国防科技大学理学院,湖南长沙410073

出　　处：《火炸药学报》2008年第5期15-18,共4页Chinese Journal of Explosives & Propellants

基　　金：国防科工委基础研究基金资助(20040213)

摘　　要：建立了基于KIM模型的一个化学反应速率方程模型,用于分析PBX起爆和爆轰行为的损伤作用。运用遗传算法确定了反应速率方程的相关参数,通过与Forest-Fire反应速率模型数值模拟结果对比,验证了所建模型的合理性。将所建反应速率方程模型嵌入有限元程序对PBX炸药二维冲击起爆过程进行数值模拟,数值模拟结果与试验结果吻合较好,可以描述分析受冲击加载造成孔隙率、颗粒尺寸等变化的损伤炸药的冲击起爆过程。A reaction rate function model built up based on KIM model is applied to analysis damage influence on initiation and detonation behavior of PBX. Reaction rate function model parameter is obtained by genetic algorithms. And validation of the model is verified by comparing simulation results with Forest-Fire model. Two dimension numerical simulation of PBX is executed to explosive＇s initiation and detonation process by embedded the new reaction rate function model into finite element analysis program. Numerical simulation results are in good agreement with experiment results of damaged explosives shock initiation and detonation behaviour. The new reaction model can be used to analyze detonation mechanism of damaged explosive while porosity and grains size is changed by impact load.

关 键 词：爆炸力学 塑料黏结炸药 反应速率方程 冲击起爆 数值模拟 

分 类 号：O643.1[理学—物理化学] TQ564.06[理学—化学]