Wheel reprofiling interval optimization based on dynamic behavior evolution for high speed trains

The comfort of the passenger is affected by their exposure to vibration and noise in the car body. Lateral stability of the bogies is a key factor of running safety. Correlation evolution of vehicle dynamic behavior and profile worn shapes is a foundation to determine wheel reprofiling intervals. Accelerometers were mounted on the bogie and car body. Vibration data was recorded daily using on-board data acquisition system. Wheel profiles were also measured periodically to get wear evolution. It is found that vibration levels increased at late reprofiling intervals sharply due to high conicity as wear. Lateral stability of the bogie and out of roundness of the wheels was also deteriorated accompanied with wear process. Through quantified evolution relationship between wheel profiles and vibrations, an optimized reprofiling interval was determined to avoid stability and noise issues.