含铝炸药圆筒试验与数值模拟

Cylinder Test of Aluminized Explosives and Its Numerical Simulation

采用圆筒试验研究了两种直径(50mm和100mm)含铝炸药的作功能力,获得了圆筒壁膨胀位移与时间的关系。利用有限元动力学程序LS-DYNA,采用Lee-Tarver点火增长三项式模型对两种含铝炸药的圆筒实验进行了数值模拟。通过与实验结果相比较,得到了含铝炸药的爆轰产物JWL状态方程和反应速率函数的参数,较好地再现了两种含铝炸药圆筒试验结果的参数。Lee-Tarver点火增长三项式模型能够较好地反映含铝炸药后期能量释放驱动圆筒壁膨胀的过程。

Power abilities of two aluminized explosives with diameters of 50mm and 100mm were studied by cylinder test and the relationships between expansion distance and time were gained. Using the finite element hydrodynamic code LS-DYNA, the cylinder tests of two aluminized explosives were simulated and the Lee-Tarver ignition and growth trinomial model was adopted. The parameters of JWL equation of state about detonation products of aluminized explosives and the Lee-Tarver ignition and growth reactive flow function were obtained by comparing the simulation results and test results, which could be reproduced accurately the cylinder tests of two aluminized explosives. The calculated result reveals the expansion process of the cylinder wail driven by the later released energy of aluminized explosives can be imaged very good by the Lee-Tarver ignition and growth reactive trinomial model.