热力学物态方程参数的统计力学表示

STATISTICAL PARAMETER OF THERMODYNAMIC EQUATION OF STATE

从统计力学出发 ,在晶格谐振近似模型下重新导出了吴强 经福谦 (吴 经 )热力学物态方程 ,给出了该物态方程参数 ,即吴 经参数R的表示式 ,致使对物态方程的计算不再依赖Gr櫣ｎｅｉｓｅｎ系数 .同时将由新参数计算出的冲击绝热线与用原参数计算得到的作比较 ,二者相当一致 ,表明统计模型给出的参数有效 .

Based on the crystal lattices oscillator model, a thermodynamic equation of state is derived using a statistical dynamics method. The new parameter R of this equation of state is independent of the Gruneisen parameter, as compared with its predecessor, which was given by Q. Wu and F. Q. Jing. The calculated shock Hugoniot loci based on this new parameter are in good agreement with those calculated by the original parameter over a wide pressure range. This validates the new form of the R parameter.