Investigating the re-adhesion performance of locomotives with bogie frame suspension driving system

ABSTRACT

The readhesion performance and driving system dynamics of locomotives with bogie frame suspension driving system were investigated. To investigate the driving system’s vibration characteristics in the adhesion saturation state and the influencing factors for locomotive’s readhesion performance, a train dynamic model was established. According to the simulation results, increasing the torsional stiffness of six-bar double hollow shaft coupling and adopting the traction motor with hard mechanical characteristics are beneficial for the locomotive’s readhesion performance. Besides, increasing the motor suspension stiffness within a certain range is advantageous. Moreover, resonance analysis was conducted, which indicated that the resonance of the driving system occurs if the natural frequency of wheelset’s longitudinal vibration is close to the rotary vibration natural frequency or its frequency doubling. Reasonable matching of primary longitudinal stiffness and six-bar double hollow shaft coupling stiffness is emphasized.

KEYWORDS:

• Heavy-haul locomotive
• bogie frame suspension
• driving system
• readhesion performance
• stick-slip vibration

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

The material in this paper is based on the work supported by grants (51675443 and 51735012) from the National Natural Science Foundation of China and National Railway Group Science and Technology Program grant (N2020J026 and N2021J028) and Traction Power State Key Laboratory grant (2022TPL_Q02) of the Independent Research and Development Projects..