Extraction of Potential Damage Points in Overhead Contact Line Systems on High-speed Railway Bridges using Drive-by Measured Track Irregularities

Abstract

Improving the maintenance efficiency of railway facilities, cross-sectional utilization of inspection data acquired for each field is required; however, not many success stories. The authors focused on the correlation between anomalies in overhead contact line system (OCS) and the resonance of bridge in high-speed railways, and a method to extract resonance bridges using onboard measured track irregularities. An indirect extraction of the OCSs requiring attention via resonance bridges detected by track irregularities is demonstrated. As a result of the verification on an actual high-speed railway, 13 of the 17 OCSs where abnormalities were recorded in the OCS were identified as resonance bridges by onboard measurements. The method was practically demonstrated to be effective as a primary screening prior to OCS inspection from the ground.