
Influences of higher order wheel polygon on vibration of wheel-rail system
YANG Runzhi1, ZENG Jing2
Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (21) : 101-110.
Influences of higher order wheel polygon on vibration of wheel-rail system
Higher-order wheel polygon can have bad effects on vehicle dynamic performance, increase wheel-rail force, cause severe vibration of a vehicle-track system, cause fatigue damage to rail and wheel tread, produce fatigue cracks and uneven wear, and form a large noise pollution.Here, the rigid-flexible coupled dynamic model of a vehicle-rail system was constructed based on the rigid-flexible coupled system dynamics theory considering flexibility of track, wheel pair (including brake disc), bearing and axle box as well as rigid frame and car body.Effects of train speed, wheel polygon order and wave depth on vibration characteristics of wheel pairs, brake discs and axle boxeswere analyzed, and vibration transfer relations between axle and brake disc were studied.In addition, by adding emergency braking conditions, influences of braking conditions on lateral vibration of brake disc were analyzed, and vibration characteristics of brake discs at different positions were compared.Finally, the reliability of the proposed model was verified with tests.
wheel outofroundness / rigid-flexible coupling / wheel-rail system / braking condition / vibration characteristics {{custom_keyword}} /
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