Wheel/rail Contact Performance on Curved Track of High-speed EMU with Elastic model

doi:10.3901/JME.2018.04.132

Abstract

Abstract: In order to study the wheel-rail contact geometry relationship, wear and creep properties when the high-speed train passing curves, an elastic model of vehicle system with rotation wheelsets is established in this article by the finite elements method and multi-body dynamics method. Through numerical simulation, the variations of contact points lateral position, creep force and abrasion of wheel-rail were obtained while the vehicle pass curves in different parameters. The results show that, compared with the rigid model, the elastic vehicle system can more accurately reflect wheel/rail contact performance with rotation wheelsets and it was more close to the actual situation of high speed EMU curve-passing. The wheel-rail lateral interactions such as lateral displacement of wheelset, lateral position of wheel/rai contact points, creep force and wear are more significantly augmented as the increase of the curve-passing speed and the track irregularity amplitude. The increases of super elevation and radius of curve track have larger influence on the abrasion of outside wheel/rail in curve track than the wheel/rail lateral interactions. The elevation of curve track with 7 000 m in radius can be set as 170 mm when the passing speed is 350 km/h to balance the abrasion. The wheel/rail abrasion of inner side in curve track will aggravate as the passing speed decreased.

Key words: abrasion, creep force, curve-passing, wheel-rail contact

CLC Number:

U270

YANG Guang, REN Zunsong. Wheel/rail Contact Performance on Curved Track of High-speed EMU with Elastic model[J]. Journal of Mechanical Engineering, 2018, 54(4): 132-141.

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