Influence of wheel profile evolution and surface hardening on wheel wear during braking
ZHU Aihua
ZHANG Caisheng
YANG Jianwei
BAI Tangbo
ZHANG Jiao
BAI Yang
LI Anyan
Abstract：To investigate the influence of wheel profile evolution and surface hardening on wheel wear dur-ing braking,this study employs measured data on metro wheel wear profiles and tread hardness.A finite element model of the wheel-brake shoe system and a rigid-flexible coupled dynamic model of a vehicle system with a flexible wheelset are established to analyze the effects of different worn wheel profiles on wheel-rail contact characteristics,wheel-rail dynamic responses,wheel-brake shoe contact stresses,and braking-induced temperature rise under emergency braking conditions.Based on the consideration of vary-ing wheel wear profiles and tread hardness,an improved Archard wear model is used to calculate wheel-rail wear,wheel-brake shoe wear,and total tread wear.The results indicate that with the increase of tread wear,both the contact stress and contact area between wheel-rail and wheel-brake shoe change sig-nificantly.Compared to the wheel-rail vertical force,the lateral and the longitudinal creep force are more sensitive to changes in the wheel profile.The wheel-rail wear is mainly affected by the wheel-rail contact stress,while the wheel-brake shoe wear is primarily affected by the initial hardness of the tread.Under emergency braking,total tread wear is dominated by wheel-brake shoe wear.
Keywords：urban rail transportwheel weardifferent wear profilewheel-rail dynamic responseemergency braking
Publication Date：2025-04-30
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：9( 174-182 )