Influence of flange deflection wear and the economy-oriented reversing control policy

Abstract

In this paper, we describe the phenomenon of deflection wear of the wheel flange and analyze the causes according to actual line conditions, and the influence of deflection wear of wheel flange is analyzed from the perspective of safety and economy of trains by combining dynamic modeling and simulation. The degree of deflection wear of wheel flange is divided into different grades. Based on the reliability-cost function, the influence of economy is quantified and introduced into the analysis of deflection wear as an index. We establish an economic model of flange deflection wear and cutting amount of reprofiling (FDW-CA). Based on the deflection wear prediction model and FDW-CA model, we model the economy-oriented reversing control policy. To verify the feasibility and validity of the control policy. The measured data before and after the reversing policy are analyzed. The results indicate that the cutting amount of wheelset is reduced from 11.2 to 6.6 mm on average for single reprofiling, and the saving is more than 40%. The reversing control policy can reduce the cutting amount of wheelset, reduce the limit probability of wheelset, extend the life of the wheelset, and reduce the operation and maintenance cost of the wheelset, and further provide basis for wheelset spare planning.