Influence of wheel/rail parameters on wheel profile wear of high-speed train

The multibody dynamics model of high-speed vehicle and the wear calculation model of wheel profile were set up.The wheel/rail contact relationship and the contact normal force were calculated by dynamics simulation.FASTSIM was used to calculate the sliding velocity, the tangential froce and the wear power dissipation in the contact patch.The wear model based on wear energy dissipation was adopted.The mass loss in a contact patch was calculated when wheelset rolled a circle.The wear depth was cumulated after vehicle ran a distance.Numerical simulation was used to study the influence of profile shape, vehicle speed, wheel back distance and rail cant on the wear depth and wear distribution of wheel profile.The result indicates that the wear regions of S1002 and LMA profiles are more even.The wear depth of LM profile is biggest.The wear regions of LM and XP55 profiles near wheel flage.When it is LMA profile with standard wheel/rail parameters, the wear depth increases with the increase of wheel back distance, and increases with the decrease of rail cant.The profile wear is closely related to the equivalent conicity.Although the profile wear is less when the equivalent conicity is smaller, the other dynamics performances should be considered when selecting the equivalent conicity.