Study on How Wheel Flat Shapes Affect Axle Box Acceleration

Abstract

It is very important to evaluate the effect of wheel flats on the acceleration of axle boxes. To understand the mechanism of the collision of the rotating wheel with a roller rig after losing contact with the roller rig, firstly, we conducted bench tests using a roller rig with a bogie set which had a wheel flat. A dynamic simulation model was then built and verified by comparing simulation and experimental results. This paper reports on how the shape at the edge of the wheel flat affects the vertical acceleration of axle boxes.