Abstract
Field investigation shows that most corrugations occur on the inner rail surface of curved tracks with a radius of less than 700 m. In order to explore the formation mechanism of metro corrugation, the relationship between wheel–rail stick–slip characteristics and rail corrugation is studied by combining single wheelset curving and a rigid–flexible coupling model. The numerical results illustrate that the lateral torsional stick–slip vibration of inner rail–inner wheel of the guiding wheelset on the small radius curve eventually leads to the generation of inner rail corrugation, and the lateral torsional stick–slip vibration of outer rail–outer wheel of the driven wheelset may also occur, but the intensity is weak and the probability is low. The lateral torsional stick–slip vibration of inner rail–inner wheel of the guiding wheelset on the large radius curve is also easy to cause inner rail corrugation, but the degree of inner rail corrugation is lower than that on the small radius curve; the outer rail on the large radius curve is still not easy to produce corrugation. The formation mechanism of rail corrugation on the straight track is different from that on the curve track, which is mainly related to the wheel–rail longitudinal torsional stick–slip vibration.
Highlights
Rail corrugation is a kind of periodic wavy wear, which frequently occurs on the running surface of a rail
The formation of rail corrugation on the straight line is mainly related to the wheel–rail longitudinal torsional stick–slip vibration, while the formation of rail corrugation on the curve line is mainly related to the wheel–rail lateral torsional stick–slip vibration
The formation mechanism of rail corrugation was explained from the theory of the wheel–rail contact stick–slip by analyzing the curve passing form of a single wheelset
Summary
Rail corrugation is a kind of periodic wavy wear, which frequently occurs on the running surface of a rail. From the perspective of microscopic wheel–rail stick–slip properties, this paper analyzes the generation mechanism of rail corrugation phenomenon commonly occurring on the metro line, including curve and straight track sections. By analyzing the curve passing form of a single wheelset, the cause of rail corrugation was explained from the wheel–rail contact stick–slip theory. Compared with the existing literature, the difference of this paper is that the cause of rail corrugation on metro lines is explored from the microscopic level of wheel–rail stick–slip behaviors, and the developed theory can well explain the rail corrugation phenomenon on curves and straight lines
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
