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《Railway Engineering》 2018-09
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Analysis of Elastoplastic Contact Between Wagon Wheel and Fixed Frog on Heavy Haul Railway

LIU Xiaodong;ZHANG Jun;MA He;FENG Quanbao;Beijing Key Laboratory of Performance Guarantee on Urban Rail Transit Vehicles,Beijing University of Civil Engineering and Architecture;Tianjin Research Institute for Advanced Equipment,Tsinghua University;  
For the serious wear of the fixed frog used in Datong-Qinhuangdao heavy haul railway,the three dimensional elastoplastic contact finite element models were established, in which the standard and worn profiles of wagon wheel and standard and worn profiles of fixed frog were matched respectly.For each matching,t he contact spot shape and area,contact trace and equivalent stress were analyzed. The results are as follows. When wheel contacts with frog at different positions,the equivalent stresses all exceed the yield limit of the material,and the wheel and frog enter the plastic deformation stage.Compared with other matching forms,when the worn wheel matches with worn frog,the ratio of the long axis to the short axis of the contact spot is less,the contact area is larger,a nd the maximum equivalent stress is smaller.This matching form is more ideal and it could decreases the wear of the frog.
【Fund】: 国家自然科学基金(51775031)
【CateGory Index】: U239.4
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