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为建立更完善和精确的结合面接触刚度模型,本文根据分形理论和摩擦学原理,从微观角度建立了考虑摩擦因素的结合面切向接触刚度分形预估模型.通过数值仿真分析研究了接触载荷、分形维数、摩擦系数和接触面积等因素对结合面切向接触刚度的影响.分析结果表明:结合面切向接触刚度随法向载荷和分形维数的增加而增大,而随分形尺度参数的增大而减小;摩擦系数对结合面切向接触刚度的影响较大,不同实际接触面积下的切向刚度相差较大;当分形维数较小时,摩擦系数对结合面切向刚度的影响将降低.这些研究对于进一步开展结合面的动力学特性研究具有重要意义.
In order to establish a more perfect and accurate model of the contact stiffness, the fractal theory and the tribological principle are used to establish the fractal prediction model of tangential contact stiffness considering the friction factor from the microscopic point of view. The numerical simulation of the contact load , Fractal dimension, friction coefficient and contact area on the contact surface tangential contact stiffness.The results show that the tangential contact stiffness increases with the increase of the normal load and the fractal dimension, and with the fractal dimension The friction coefficient has a great influence on the tangential contact stiffness of the joint, and the tangential stiffness varies greatly with different actual contact areas. When the fractal dimension is small, the friction coefficient affects the tangential stiffness of the joint Will reduce the impact of these studies for the further study of the dynamics of the binding surface of great significance.