ANALYSIS ON CONTACT BETWEEN THE WHEEL AND LONG AS WELL AS SHORT POINT RAILS OF HIGH-SPEED TURNOUT

In view of the wearing problem happened when a multiple unit train and locomotive wheels contact with high-speed turnout, the actual geometry size of worn wheels and worn turnout on the running line have been measured. The finite element method is applied to solve the wheel-turnout contact problems. The contact states in different locations between the wheels and the long/short point rail of the high-speed turnout are calculated. The distribution and varying rules of a contact patch, the equivalent stress and contact normal forces under different operating conditions are analyzed. The results provide theoretical basis for the rational design of turnouts and wheels. The results demonstrate: the match relation is not reasonable between the JM3 wheels and the point rail of the No.18 high-speed turnout; the maximum stress value of aforesaid conditions exceeds the yield limit of the materials, and the plastic deformation of the materials occurs; the horizontal shift of wheel affects the wear between wheels and turnouts. The bigger horizontal shift towards the lateral of point rail is, the more serious the wear is.