Effect and mechanism of wheel–rail adhesion on torsional vibration and stability of the braking system. (January 2023)

• Record Type: Journal Article
• Authors: Wang, Quan; Wang, Zhiwei; Mo, Jiliang; Wang, Ruichen; Wang, Kaiyun
• Is Part Of: Tribology international. Volume 179(2023)
• Publication Date: 2023-01
• Subjects: Braking system -- Torsional vibration -- Negative slope characteristics -- Stability; Tribology -- Periodicals; 621.89
• DOI: 10.1016/j.triboint.2022.108182
• Languages: English
• ISSNs: 0301-679X

Abstract

Abstract: A high-speed train braking system with the disc–pad sliding friction pair and the wheel–rail rolling friction pair is a classic torsional system. By adopting a developed braking system torsional dynamics model, the influences of dry and wet rail surface conditions on system dynamic responses were investigated. Further, the system stability under different disc–pad friction and wheel–rail adhesion characteristics was explored and the interaction mechanism between the disc–pad and the wheel–rail sub-systems was revealed. The results indicated that the wheel–disc torsional vibration was more complicated under the wet rail surface condition. Moreover, the braking system had worse stability when the negative slope characteristics of disc–pad friction and wheel–rail adhesion were interacted. Highlights: Disc–pad friction and wheel–rail adhesion characteristics were analyzed when braking. Torsional vibrations in the wheel stick and slip states were explored. Braking system stability affected by negative friction-velocity slope was investigated. Interaction mechanism between the disc–pad and wheel–rail sub-systems was discussed.