爆炸平面冲击波在金属颗粒介质中的衰减

 分析了颗粒介质在冲击载荷下的加载、卸载本构关系，应用特征线理论对平面一维爆炸冲击波在颗粒介质中的衰减进行了计算。结果表明：组成颗粒的材料、孔隙率及炸药的爆速决定了初始冲击波峰值的大小。炸药爆速越高，介质孔隙率越大，材料本身的冲击阻抗越大，初始压力越高。炸药长度、材料本身的冲击阻抗及介质的孔隙率决定了冲击波的衰减速度。炸药长度越小，材料本身的冲击阻抗越大，介质的孔隙率越高，冲击波衰减越快。

Planar Explosion Shock Wave Attenuation in Granular Metal

The loading and unloading paths of shock impact on granular metal were analyzed, and the attenuation of planar explosion shock wave in granular metal was investigated using characteristic method. The results showed that the initial peak pressure of the shock wave was determined by the type and property of the metal, porosity and detonation velocity of the explosive. The higher of impact impedance and porosity of metal and higher the detonation velocity were, the higher initial peak pressure was. The attenuation was determined by the length of explosive, impact impedance and porosity of the metal. The higher of impact impedance and porosity of metal and shorter explosive cylinder was, the more quickly the shock wave attenuated.