高能炸药摩擦感度理论初步研究  

Theoretical Analysis on Friction Sensitivity of High Explosive

作　　者：林文洲[1] 洪滔[2] 

机构地区：[1]中国工程物理研究院研究生部,北京100080 [2]北京应用物理与计算机数学研究所,北京100088

出　　处：《含能材料》2007年第1期12-15,共4页Chinese Journal of Energetic Materials

摘　　要：根据炸药的热反应扩散方程,通过理论分析和数值模拟的方法对高能炸药的摩擦感度进行了研究。理论模型中考虑了由于炸药与金属摩擦作用导致炸药的熔化,以及炸药温度变化引起炸药与金属之间摩擦阻力的变化。通过数值模拟考察了不同的摩擦系数对炸药与钢摩擦引起的点火的影响,得到了HMX在400MPa的压力作用下以3.8m·s-1的相对速度与钢摩擦时界面温度的变化。当摩擦界面温度达到750K时,炸药发生点火。确定了HMX的点火时间为0.43ms,金属与炸药的滑移的距离为1.6mm,与HMX的摩擦感度实验结果基本符合。Friction sensitivity of high explosive was analyzed according to thermal explosion theory by theoretical analysis and numerical modeling. Melting of high explosive by friction between high explosive and metal was considered in the model. The change of friction force acting on high explosive due to melting was taken into account. Temperature increase on friction surface and ignition time of high explosive were determined by ca!cu]ation. The pressure acting on HMX was 400 MPa and relative velocity was 3.8 m ·s^-1 between high explosive and steel,the same as the friction sensitivity test for high explosives. As the temperature on friction surface reached 750 K,ignition of high explosive occured. Ignition time was 0.43 ms and slide distance between steel and high explosive was 1. 6 mm. The slide distance is in agreement with experimental one quite well.

关 键 词：爆炸力学 高能炸药 摩擦感度 点火 熔化 

分 类 号：TQ560.1[化学工程—炸药化工]