In a domestic high-speed railway,the corrugation wear is serious on the lower rail of railway curve with a radius of 1 600 m.When the rail is grinded in the traditional way,the corrugation occurred again 4 months later.Based on the actual measurement of rail profile,the profiles of upper and lower rails on the curve are designed person-alized.After personalized design profile is adopted for grinding rails,the generation period of the corrugation wear is extended to 8 months.Through the establishment of dynamic model and simulation calculation,the following conclu-sions are drawn:compared with the traditional grinding method,when the rail profile is designed personalized to gvind the rail and the wheelset traverse is 0～9 mm,the wheel radius difference of wheel-rail contact increases to vary-ing degrees;the conitity of wheel-rail contact increased from 0.087 to 0.133 when the wheelset transverse is 6 mm,which increased by 53%,and the ability of wheels passing through curves increased obviously;points of wheel-rail contact are evenly distributed on the rail surface,and in the process of snaking movement,the contact points move evenly on the rail surface with less jumps;on the lower rail of curve,the change rate of average creep rate and creep rate variation range decrease by 89.6%and 80.9%respectively,the wheel-rail motion is closer to pure rolling,and the wheel-rail contact state is more stable,which has obvious effect on prolonging the generation period of rail corru-gation disease.
万方数据
维普
