Study on the mechanism for the wheel polygonal wear of high-speed trains in terms of the frictional self-excited vibration theory
| Autor: | J.Z. Lv, Q. Zhu, S. Zhang, B. W. Wu, Xin Zhao, Chen Guangxiong |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
business.product_category
Materials science business.industry media_common.quotation_subject 02 engineering and technology Surfaces and Interfaces Structural engineering 021001 nanoscience & nanotechnology Condensed Matter Physics Fastener Vibration theory of olfaction Surfaces Coatings and Films Mechanism (engineering) Vibration 020303 mechanical engineering & transports 0203 mechanical engineering Creep Mechanics of Materials Materials Chemistry Slab Sensitivity (control systems) Eccentricity (behavior) 0210 nano-technology business media_common |
| Zdroj: | Wear. :1820-1827 |
| ISSN: | 0043-1648 |
| DOI: | 10.1016/j.wear.2019.01.020 |
| Popis: | In the paper, the frictional self-excited vibration of a wheelset-track system caused by the saturated wheel-rail creep force is proposed as a possible mechanism for wheel polygonal wear of high-speed trains. The wheelset-track system model is established, which consists of a wheelset, two rails, some sleepers and a slab. The stability of the wheelset-track system is studied through the complex eigenvalue method. Results show that the unstable vibration frequency of the wheelset-track system is f= 495.01 Hz, which can lead to the 18th-order wheel polygonal wear. This simulation result is approximately consistent with the field measurement result. Furthermore, the parameters sensitivity analysis shows that increasing the vertical damping of the fastener to a certain extent can suppress or eliminate wheel polygonal wear. In addition, a transient dynamic analysis of the wheelset-track system with the wheelset eccentricity is conducted. Results indicate that the wheelset eccentricity is an important factor affecting wheel polygonal wear. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect