基于形貌测量的结合面法向接触刚度计算

method to identify the contact stiffness of joint surface through the analysis of micro-topography of the contact surfaces is proposed in this paper. The theoretical method and an example is given. The measured surface is divided into roughness surface and waviness surface. On the roughness surface, the functional relation between contact stiffness per unit area and contact pressure is calculated. And the functional relation between real area of contact and contact pressure is developed on the waviness surface. A power function between contact stiffness and contact pressure of a real surface is obtained the combination of the two above rations. Experimental results show that the method is effective.