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Identification of Out-of-Round Wheels on Heavy-Haul Railway Lines by Using Ballast Pressure Data
Abstract
A Model-Based Estimate Method (MBEM) was introduced to estimate wheel-rail force by using track dynamic response data, the estimated result then be used for of OOR wheels identification. The function of dynamic force transfer between the wheel-rail force and tie displacement was developed based on a double layers track model. A case study was conducted to verify the result. Test equipment was made for tie-ballast interface pressure measurement. The equipment was installed on a heavyhaul railway line in the United States, long-term monitoring on ballast pressure was conducted. A series of preprocessing methods were used to obtain the normalized pressure data. According to the comparison between Wheel Impact Load Detector (WILD) data and ballast pressure data, the relationship between ballast pressure and wheel load was established. The wheel-rail force of each wheel was calculated by using the MBEM method.
DOI
10.12783/shm2019/32163
10.12783/shm2019/32163