斜波压缩下PBX-59未反应固体炸药的状态方程

Equation of State of Unreacted Solid Explosive PBX-59 Under Ramp Wave Compression

利用磁驱动加载实验技术,开展了斜波压缩下未反应固体炸药PBX-59的动力学特性研究,获得了峰值压力18.5 GPa下PBX-59的动力学响应。利用阻抗匹配修正的迭代Lagrange数据处理方法,获取了PBX-59炸药斜波压缩加载下的p-V关系和声速-粒子速度关系等动力学特性参数。结合实验获得的动力学参数和等熵状态方程,对实验过程开展了流体动力学数值模拟,计算和实验结果基本吻合,验证了本研究实验技术、数据处理方法和物理模型的正确性。

The dynamic characteristics of unreacted solid explosive PBX-59 under ramp wave compression were studied with a magnetic driven loading experimental technique,and the dynamic response of PBX-59 under a peak pressure up to 18.5 GPa was obtained.The p-V relationship,the acoustic velocity-particle velocity relationship and other dynamic parameters of PBX-59 were obtained by the iterative Lagrange data processing method modified by impedance matching under the ramp wave compression.Combined with the dyamic parameters and isentropic equation of state derived from experimental data,the experimental results were hydrodynamically simulated.The numerical calculation agree well with the experimental results,which verifies the validity of the experimental technology,data processing method,and physical model.