合金冲击波后压力的近似计算

Approximate calculations of the alloy pressure behind shock waves

在凝聚态三项式状态方程的概念框架内,提出了两种计算合金冲击波后压力的近似方法。第一种方法基于道尔顿气体分压定律,由单质金属材料的计算结果合成合金的波后压力;第二种方法是构造合金材料的虚拟单质材料模型,它充分利用状态方程中的三项在不同温度和密度范围内的不同作用,以及三项能独立构造的特点。计算得到的数值结果与W-Cu合金材料冲击波实验数据进行了比对。根据计算精度判断,冷压参数满足胡-经关系式的虚拟单质材料模型优于第一种方法。

Two kinds of the approximate calculation of the alloy pressure behind shock waves were presented within the conceptual framework of the three-term equation of state.The first type is based on Dalton partial pressure law,in which the alloy pressure behind shock waves is combined with that from each of component metal of the alloy.The second method is by means of a virtual-elemental-metal model,which takes full advantage of the characteristics for the three-term equation of state where each term dominates in the different range of the density and temperature and can be constructed independently.The computational results are compared with the shock-wave experimental data for the alloy of W and Cu with various combinatorial mass ratios.The calculated results by the virtual-elemental-metal model,which satisfies the Hu-Jing relation for the fitting formula of the cold pressure and the cold energy,is better.