Wheel flat is one kind of faults of wheelset and has great effect on the wheel/rail system dynamics and damages. In the most of presented studies, the impact velocity or the radius variable because of the wheel flat were taken into account to research the wheel/rail system impact characteristics. In the presented paper, included the length, width and depth, a 3 dimensional wheel flat model on wheel profile is established. The wheel rotating and wheel/rail contact geometries are included in the model. Based on a high speed vehicle/rail coupling system dynamics model, the effect of the wheel flat on the wheel/rail dynamics are investigated. The results show that the width of the wheel flat has great influence on the wheel/rail dynamics. The ratio between the width and length of the flat has great effect on the wheel rail impact too. The wheel/rail impacting dynamics with larger width and shorter length flat is more severe than that of the flat with smaller width and longer length. The wheel/rail contact geometry when the wheel passes through the flat area are presented. It is useful of the results to comprehensively understand the wheel/rail impacting mechanics and effects.
REN Zunsong
. Study on Wheel/Rail Impact Dynamics with Three Dimensional Wheel Flat Model[J]. Journal of Mechanical Engineering, 2018
, 54(15)
: 78
-85
.
DOI: 10.3901/JME.2018.15.078
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