The abnormal damage of PR clips of a subway line during the operation and the corresponding track structure are investigated in order to reduce vibration and suppress noise in subway circumstance. The quality defects in the construction process are summarized. Through the test of dynamic displacement of the rail and the detection and analysis of the rail corrugation, the dynamic displacement of the rail system is obtained and the excitation frequency of the wheel/rail is found to be 722 Hz. Compared with the models of the installed clip with the results of analysis, it is found that the modal frequency 722 Hz of the installed clip is close to the wheel/rail excitation frequency. Therefore, it is concluded that the rail corrugation and the resonance due to the frequency coincidence of the clip vibration and the wheel/rail excitation are the main factors of the clip abnormal damage. Finally, the reasonable suggestion and methods for solving this problem are put forward, which provides a reference for track maintenance, vibration reduction, and noise suppression.
Damage Analysis of PR Type Fastener Clip for Vibration Reduction and Noise Suppression in Subway Circumstance
13th Asia Pacific Transportation Development Conference ; 2020 ; Shanghai, China (Conference Cancelled)
29.06.2020
Aufsatz (Konferenz)
Elektronische Ressource
Englisch