Frictional Heat Generation on Three-dimensional Rough Surfaces of Wheel Tracks Based on G-W Theroy
In order to study the distribution of heat,temperature and stress fields and their mutual influence on the sliding process of the wheel-rail friction substrate,based on the G-W model,the wheel-rail friction substrate was simplified into a rough surface of mi-cro-convex bodies with different shapes and an ideal plane,and combined with the finite element method.The results show these as fol-lows.The interaction between the micro-convex bodies has an impact on the frictional heat generation,with the increase of the stack of spherical crown-shaped micro-convex bodies,the distribution area of the heat zone increases and the heat source decreases.The friction temperature rise decreases with the increase of the number of micro-bumps in the X-direction,and increases with the increase of the number of micro-bumps in the Z-direction,and the distribution of the heat zone is concentrated behind the sliding direction.The fric-tion temperature rise on the rough surface of the spherical crown-shaped micro-convex body is generally higher than that of the rectangu-lar-shaped micro-convex body.The effect of rough surface morphology on the heat source,heat zone distribution,temperature field and stress field distribution of wheel-rail friction is explored at the microscopic level to provide a theoretical basis for further research on wheel-rail interaction and ensure safe train operation.
万方数据
维普
