By means of the measurement and analysis of the actual grinding wheel surface topography, the density and height distribution of abrasive grains are obtained. Based on the virtual grid method, a virtual grinding wheel model is built, which the abrasive grains are randomly distributed and height is normally distributed. Furthermore, a 3D simulation model of rail grinding is established. The influence of different grinding rotational speed on grinding force, removal amount, surface roughness, grinding surface topography are simulated and explored. The rail grinding experiments are carried out by means of a rail grinding friction machine and the testing results are compared with the simulation results. The results show that the grinding force slightly decreases and the removal amount obviously increases with the grinding rotational speed increasing. The surface roughness decreases with the increasing of grinding rotational speed, but increases with the increasing of grinding depth. The surface of grinding rail exhibits many ploughing and regional material uplift. The simulation results are consistent with experimental results, which verify the reliability of simulating model for calculating the materials removal of rail grinding.
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