Effect of Driven Modes on Metro Wheel/rail Interactions under Complex Wheel/rail Friction Conditions

doi:10.3901/JME.2024.14.215

Abstract

Abstract: Metro trains are commonly driven by the linear induction motors(LIM) or rotary motors(RM). The LIM and RM metro vehicle-track coupled dynamic models are respectively established, in which the wheel/rail non-Hertzian rolling contact is performed with consideration of spatial vibrations of wheelsets and rails. The wheel/rail frictional contact under changeable friction conditions with respect to the metro vehicles with different driving modes is systematically compared. The numerical investigations suggested that the traction loadings have a significant effect on wheel/rail tangential interactions of the RM vehicle, which however, contribute little to the wheel/rail tangential interactions of the LIM vehicle. The anti-slip controllers of the RM vehicles will be triggered when the powered wheelset enters into the low-adhesion zones, and the wheel/rail contact is full-slip under this case. On the other hand, the wheel/rail contact of the LIM vehicles is prone to be locally slipping with low-friction adhesion conditions. Moreover, the wheel/rail frictional wear of the RM vehicles is clearly higher than that of the LIM vehicles under complex friction conditions due to the lower level of frictional contact.

Key words: metro, driven modes, vehicle-track coupled dynamics, complex wheel/rail friction conditions, wheel/rail non-Hertzian contact, wear

CLC Number:

TG156

LI Muxiao, LIU Pengfei. Effect of Driven Modes on Metro Wheel/rail Interactions under Complex Wheel/rail Friction Conditions[J]. Journal of Mechanical Engineering, 2024, 60(14): 215-226.

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