- 1. 北京理工大学爆炸科学与技术国家重点实验室，北京 100081
摘要: 为了优化叠氮化铜微装药器件的设计，探究叠氮化铜爆轰驱动飞片的作用原理，根据微装药器件的实际设计和相关实验，采用ANSYS/LS-DYNA流固耦合算法对叠氮化铜爆轰驱动飞片的作用过程作了数值模拟。具体研究了加速膛长度对飞片的平整性和完整性的影响，分析了微装药的尺寸与飞片速度之间的关系。研究结果表明：加速膛的长度对飞片的完整性、平整性和速度具有重要影响，在过长的加速膛中飞片飞行时易发生破碎，加速膛过短飞片的驱动速度不能达到最佳。装药尺寸与飞片速度之间关系密切，装药直径对飞片速度的前期成长影响不大，但对飞片获得的最大速度却有较为明显的影响；装药的直径大于0.8 mm时，增加装药直径并不能使飞片的最大速度明显增加。
Simulation of flyers driven by the detonation of copper azide
- 1. State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100083, China
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Abstract: Aim to optimize the design of MEMS copper azide fuze and investgate the mechanism underlying the process of the copper azide explosive-driven flyer plate. According to the actual design of the micro-charge fuze and its related experiments, the process of the copper azide explosive-driven flyer plate was simulated adopting the fluid-solid coupling algorithm in LS-DYNA program. The influences of the barrels length on the flyers velocity and integrity were studied and the relationship between the micro-charge size and the flyer's velocity were discussed. Our research results indicate that the barrels length has a major impact on the flyers velocity and integrity. It is found that, when it is accelerated in a long barrel, the flyer is likely to be more fragile and cannot achieve maximal driving velocity. The size of the micro-charge is uniquely related with the flyers velocity in that the flyers maximum velocity is significantly affected by the charges diameter. With the increase of the thickness of the charge, the average velocity and the maximal velocity were raised gradually. When the charge diameter is above 0.8 mm, its influence on the flyers maximal velocity is not remarkable.