Dynamic Diagnosis Method for Continuous and Equidistant Wheel Burn based on Axle Box Acceleration

Continuous and equidistant wheel burn (CEWB) of high-speed railway rails will arouse heavy vibrations between the wheels and rails under high-speed conditions, increase the probability of structural damage of the track-vehicle system components, and cause the rails to break in severe cases. Using high-frequency axle box acceleration (ABA), the continuous equidistant wheel burn index (WBI) method of rails is proposed to diagnose CEWB of high-speed railway rails. The continuous equidistance WBI of rails can describe the high-frequency vibration caused by the CEWB of rails. It solves the problem of CEWB cannot be dynamically detected. The new evaluation method uses the demodulated envelope signal of the ABA to replace the original signal, and demodulates the high-frequency discrete response signal into a stable low-frequency energy signal without losing the vibration characteristics. The results of high-speed rail applications show that the new evaluation method can effectively diagnose the of CEWB on rail surface.