The rail grinding process generates a large amount of heat, which could lead to heat damage on the ground rails. But, the whole temperature field of rail ground by the grinding train has not been explored in detail. In the present study, finite element models of a rail and grinding wheel were established to simulate the rail grinding process. The temperature field and the thermo-mechanical coupling stress during rail grinding, and the residual stress after grinding were studied. Furthermore, through simplifying grinding wheels into heat sources, the temperature field of rail ground by a whole grinding train was investigated as well. The results indicated that the grinding temperature and the residual stress increased with the grinding depth and rotational speed, but decreased with the feed speed and radius of rail head. The thermo-mechanical coupling stress increased with the radius of rail head and grinding depth, and decreased with the rotational speed and feed speed. When ground by the whole grinding train, the increase in the number of grinding wheels at the same grinding angle and adjacent angles could lead to a rise in temperature on the rail surface. The speeds of grinding train and the rail head radius also have an influence on the temperature. The optimal feed speed of the grinding train should be below 12 km/h for R300, 16 km/h for R80, and 18 km/h for R13. The results could be used to optimize the grinding parameters and grinding pattern in the field.

导轨磨削过程会产生大量热量，这可能会导致接地导轨受热损坏。但是，尚未详细研究由磨削磨削产生的铁轨的整个温度场。在本研究中，建立了轨道和砂轮的有限元模型来模拟轨道磨削过程。研究了钢轨磨削过程中的温度场和热力耦合应力，以及磨削后的残余应力。此外，通过将砂轮简化为热源，还研究了整个砂轮磨削的钢轨的温度场。结果表明，磨削温度和残余应力随磨削深度和转速的增加而增大，但随进给速度和导轨头半径的减小而减小。热力耦合应力随着钢轨头半径和磨削深度的增加而增加，而随转速和进给速度的减小而减小。当由整个磨削轮系进行磨削时，在相同的磨削角度和相邻的磨削角度下，砂轮数量的增加可能会导致导轨表面温度升高。磨削速度和轨头半径也会对温度产生影响。R300的最佳磨削进给速度应低于12 km / h，R80应当低于16 km / h，R13应当低于18 km / h。结果可用于优化现场的研磨参数和研磨模式。在相同的磨削角度和相邻的磨削角度下，砂轮数量的增加可能会导致导轨表面温度升高。磨削速度和轨头半径也会对温度产生影响。R300的最佳磨削进给速度应低于12 km / h，R80应当低于16 km / h，R13应当低于18 km / h。结果可用于优化现场的研磨参数和研磨模式。在相同的磨削角度和相邻的磨削角度下，砂轮数量的增加可能会导致导轨表面温度升高。磨削速度和轨头半径也会对温度产生影响。R300的最佳磨削进给速度应低于12 km / h，R80应当低于16 km / h，R13应当低于18 km / h。结果可用于优化现场的研磨参数和研磨模式。