Journal
VEHICLE SYSTEM DYNAMICS
Volume 55, Issue 2, Pages 244-267Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/00423114.2016.1254260
Keywords
Gear transmission; mesh stiffness; vehicle-track interaction; wheel-rail irregularity; adhesion; dynamic transmission error
Categories
Funding
- National Natural Science Foundation of China [51405400, 51478399]
- Fundamental Research Funds for the Central Universities [2682016CX125, 2682015ZD12]
- Fundamental Research Funds for the State Key Laboratory of Traction Power of Southwest Jiaotong University [2015TPL_T14]
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A gear transmission system is a key element in a locomotive for the transmission of traction or braking forces between the motor and the wheel-rail interface. Its dynamic performance has a direct effect on the operational reliability of the locomotive and its components. This paper proposes a comprehensive locomotive-track coupled vertical dynamics model, in which the locomotive is driven by axle-hung motors. In this coupled dynamics model, the dynamic interactions between the gear transmission system and the other components, e.g. motor and wheelset, are considered based on the detailed analysis of its structural properties and working mechanism. Thus, the mechanical transmission system for power delivery from the motor to the wheelset via gear transmission is coupled with a traditional locomotive-track dynamics system via the wheel-rail contact interface and the gear mesh interface. This developed dynamics model enables investigations of the dynamic performance of the entire dynamics system under the excitations from the wheel-rail contact interface and/or the gear mesh interface. Dynamic interactions are demonstrated by numerical simulations using this dynamics model. The results indicate that both of the excitations from the wheel-rail contact interface and the gear mesh interface have a significant effect on the dynamic responses of the components in this coupled dynamics system.
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