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.