The effect of wedge friction conditions on the dynamic wheel-rail contact force on short wavelength defects

Author

Sun, Yan Quan ; Cole, Colin

Author_Institution

Centre for Railway Eng., Central Queensland Univ., North Rockhampton, Qld., Australia

fYear

2006

fDate

4-6 April 2006

Firstpage

37

Lastpage

43

Abstract

For wagons with three-piece bogies, the suspension dynamic characteristics are largely dependent on the friction condition of the wedge dampers. The influence of changes in wedge friction conditions on the dynamic wheel load is investigated. Comprehensive wagon-track modelling has been developed for the analysis. Simulations show that a small friction coefficient on the wedge contact surfaces can lead to the severe resonance of suspension system, causing large dynamic wheel loads and high levels of wheel unloading while with a large friction coefficient, suspension resonance is restricted, leading to smaller dynamic wheel loads.

Keywords

friction; mechanical contact; railways; suspensions (mechanical components); wheels; dynamic wheel-rail contact force; friction coefficient; short wavelength defects; suspension dynamic characteristics; suspension resonance; suspension system; wedge contact surfaces; wedge dampers; wedge friction conditions; Damping; Friction; Geometry; Rails; Resonance; Shock absorbers; Springs; Surface waves; Vehicle dynamics; Wheels;

fLanguage

English

Publisher

ieee

Conference_Titel

Rail Conference, 2006. Proceedings of the 2006 IEEE/ASME Joint

Print_ISBN

0-7918-4203-7

Type

conf

DOI

10.1109/RRCON.2006.215291

Filename

1634056