An improved simplified model of rough surface profile

In order to obtain accurate characteristic parameters of contact between rough surfaces, such as curvature radius of asperity, a new method of asperity definition based on the reference line and the height of peak and valley is proposed in this paper. The real profile of the rough surface is described by parabolas. To improve the stability of contact calculation of the rough surface, the nominal contact line is taken as a simplified reference line. The simplified results show that: 1) the mean square error between the parabolas simulated by the proposed method and the real profile is smaller; 2) the calculation of contact pressure, contact area and other contact performance parameters have better stability.