小隔板试验冲击起爆和熄灭流场的实验与Lagrange分析

Experimental investigation and Lagrange method used for small partition assay

1.
Earthquake Engineering Research Test Center， Guangzhou University, Guangzhou 510405， Guangdong, China

摘要: 根据小隔板试验的拉氏传感器测试结果，用拉氏分析方法求得了粗颗粒包复TNT炸药中的冲击波成长过程和熄灭过程的流场分布，用实验结果确定了点火增长模型中的待定参数。利用拉氏分析方法时，对未反应炸药和已反应产物的状态方程都采用JWL状态方程，使确定的参数可以直接用于有限元程序LSDYAN计算。通过拉氏分析得到了各迹线上的反应度，结果表明，冲击波在熄灭过程中仍能引起炸药的局部化学反应。

Abstract: The process of explosives (wrapped coarse granule TNT, =1.547 g/cm3) shock initiation and extinguishment was experimentally investigated and analyzed by Lagrange method in the case of small partition assay. The state equations of explosive and reaction products are all based on JWL state equations. The value-time relations of u,v,e on every Lagrange position are obtained and the parameters in the reaction rate equation have been determined, which utilizies the ignition and growth model.The reaction rate obtained by Lagrange method indicates that there are partly reactions when the shock wave extinguishs in the solid explosives.