Analysis of the influence of wheel-rail impact on axle box bearing system of high-speed railway passenger cars
The wheel-rail impact caused by wheel tread flat scars is one of the common causes of damage to the axle box bearing system.To study its influencing mechanism,this paper introduces the impact load simulated by the wheel tread flat scar motion model into the torque balance model of the axle box system with double row tapered roller bearings for railway passenger cars.The internal contact deformation,deflection,and local ultimate contact stress of the axle box bearing system caused by different lengths of flat scars under actual working conditions are calculated,and the correlation between fatigue failure of the axle box bearing system and wheel-rail impact contact is evaluated.According to the calculation results,from the perspective of bearing service life,it is recommended to limit the length of wheel tread flat scars to within 30 mm when the train speed approaches 300 km/h.
万方数据
维普
