Dynamic Behavior of Worn Wheels in a Track Containing Several Sharp Curves Based on Field Data Measurements and Simulation

Abstract

A study of the wheel and rail wear phenomenon can provide a chance for the optimal use of wheel pro le, which results in cost e ciency, dynamic stability, travel comfort, and safety to prevent the derailment, especially in curves. In this paper, the experimental data are recorded based on the eld measurements for worn wheels of a passenger wagon in the \Southern line" of Iran's railway system and are combined with the dynamic simulations to study the e ects of severe wheel ange wear on the dynamics of wagon. The results show that the amount of wheel wear (especially the wheel ange) directly impacts the dynamic behavior of the wagon in curves. In addition, based on the history of wear index and the peak derailment ratio, the appropriate range of the wheel ange thickness required to repair or replace the worn wheels is suggested to be 25 to 27 mm.

Dynamic Effect of Hollow-Worn Wheels for Freight Rail Vehicles in a Consist

“…Real cases such as the effect of the worn wheels in rail cars have been studied in different scenarios. Salehia et al [1] presented the effect of wheels with worn flange on a passenger rail car based in experimental data. Pardhan et al [2] found that higher temperature, the softening of the rail-wheel material increases the rate of wheel wear of a passenger rail car under real condition as the speed profile, braking force, and contact parameters.…”