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摘要
In order to explore the relationship between surface topography parameters and fluid dynamic pressure lubrication and friction properties of rough contact interface, the Reynolds equation was solved by finite difference method. Combined with the film thickness equation and shear force (friction) equation, the three-dimensional distribution of contact pressure and friction on random rough surface was obtained. The theoretical model and calculation method were validated through computer simulation of three-dimensional random rough surface. Random rough contact load and friction increase nonlinearly with the increase of some surface topography parameters, such as surface height in the root mean square deviation, surface height distribution skewness and surface area ratio which are in the ISO 25178 international standard. However, they decrease significantly with the increase of the maximum decay rate of autocorrelation. It is revealed that the influence of the characteristics of "peak" and "valley" on the bearing capacity and friction force of contact interface. The results provide a theoretical basis for functional characterization of surface topography.
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