Abstract: An approach to perturbation theory of fluids (including liquids and dense gases) is described. Two equations of state for hard particle reference fluid are series representations. These are obtained from a new radial distribution function For hard spheres, the three-term truncated form of the equations are the same as the pressure and the compressibility equation of state given by the Precus-Yevick theory. The molecular potential of real fluid is approximated with a number of square-well nonspherical potentials and the higher-order perturbation terms are obtained by using generalized Barker-Henderson approximation. A formula for the thermodynamic properties of multi-square-weii nonspherical potential hard particle perturbation is being derived.

摘要： 本文从考虑真实分子的形状与势能出发,引进一新的用级数表示的径向分布函数形式,导出了任意形状硬粒子流体的级数状态方程.用此方程描述参考体系,用多方阱势来近似真实分子的势能曲线,采用Barker与Henderson的方法近似高级微扰项,导出了非球形多方阱势硬粒子微扰理论的通用表达式,以作为进一步导出实用状态方程的基础.