New strategies and metrological characteristics with an instrumented wheelset are here discussed to obtain more precise measurement and higher signal-to-noise ratio. The paper describes the loads test program performed on new high-speed train running in China. A high-speed wheelset was instrumented on the axle and on the wheels with strain gauges and that signals were acquired by digital radio telemetry systems. The reliable and precise instrumented wheelset being developed went through a special calibration procedure that utilised a wheelset roller rig on which known load time histories were applied generating running conditions similar to those encountered in service and providing a more realistic condition to perform the calibration as result. The calibration of the measuring system was also improved by following a minimisation approach to estimate the optimal transfer function between the strain measurements and the wheel/rail contact forces. A field test was performed on new high-speed line and the measurements integrated contact loads and axle stresses results with GPS and gyroscope information. A specific program was prepared for data processing to obtain load spectra. The developed system has been verified to assure sufficient durability for continuous measurement on in-service trains and sufficient accuracy after various stand tests.
Evaluation and analysis approach of wheel–rail contact force measurements through a high-speed instrumented wheelset and related considerations
Vehicle System Dynamics ; 58 , 8 ; 1189-1211
02.08.2020
23 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
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