01595675

Component

The height difference between switch rail and stock rail at switch of high-speed turnout may cause noticeable hunting motion of wheel-set. The hunting motion of wheel-set may degrade lateral stability of carbody and produce lateral impact on rails greatly. Based on the theory of asymmetrical rail grinding, the paper presented a method to enlarge the rolling radius difference between the two wheels of a wheel-set by grinding the gauge side of straight stock rail and the field side of curved stock rail, to improve the ability of wheel-set to back to the line center, and the final purpose is to improve the hunting motion of wheel-set traveling at the switch of high-speed turnout in the main line. The wheel/rail (w/r) contact status and the dynamic characteristics of vehicle-turnout coupling system before and after asymmetrical rail grinding were compared and analyzed using numerical calculation and theoretical simulation. The results show that the asymmetrical rail grinding method is advantageous in improving the hunting motion of wheel-set and the lateral stability of vehicle when travelling at the switch of high-speed turnout in the main line, however, it is disadvantageous in worsening the rail defects and wear within the range of wheel load transition.

This paper was sponsored by TRB committee AR060 Standing Committee on Railway Maintenance.

01584066

16-1676

English

15p

2016

Transportation Research Board 95th Annual Meeting

Digital/other

Figures; References; Tables

Before and after studies; Car wheels (Railroads); Numerical analysis; Rail grinding; Railroad turnouts; Rolling contact; Simulation

Maintenance and Preservation; Railroads; Vehicles and Equipment

Transportation Research Board Annual Meeting 2016 Paper #16-1676

TRIS, TRB, ATRI

Jan 12 2016 4:43PM