中文摘要：

提出了一种基于分形理论的结合面改进接触模型,并通过对所建模型的仿真,直观地揭示了结合面法向接触刚度与结合面法向载荷、结合面分形维数D、结合面分形特征尺度参数G之间复杂的非线性关系。仿真结果表明,法向接触刚度随着法向载荷增大而增大,随着G的增大而减小,随着D的变化规律比较复杂,同时表明该模型可以用于结合面法向接触载荷和法向接触刚度的分析与计算。

英文摘要：

A modified contact model of joint interfaces based on fractal theory was proposed.Furthermore,numerical simulation was carried out to obtain the complicated nonlinear relations between normal contact stiffness and the normal contact load、the fractal dimension D and the fractal characteristic length scale parameter G.The results showed that the normal contact stiffness increased with the normal load,decreased with G but complicatedly with D.The results showed that the contact model could be used to calculate the normal contact stiffness and the normal load.