Measurement Method of Rail Locking Temperature Based on Stress Test Using Ultrasonic
DI Jinyu;Baoding Track Maintenance Division,China Railway Beijing Bureau Group Co.Ltd.;
According to the data of rail temperature of continuous welded rail,r ail stress obtained by ultrasonic and environmental temperature,the change rules of rail stress and rail lock temperature were summarized. By the combination of time difference of critical refraction longitudinal wave( LCR) produced by ultrosonic crossing certain distance and the rail elastic constant and the initial situation of rail without stress,the actual rail stress could be obtained.The method of stress test using ultrasonic is effective to measure rail stress and rail lock temperature.The rail safety state could be dertermined using this method.
【CateGory Index】： U216.3