A New Monitoring Method of Wheel/Rail Contact Forces Caused by Out-of-Round Railway Wheels

Abstract:

Traditional methods of wheel-rail contact forces measurement all need strain gauges on wheel sets or rails. The shortcomings of strain gauges such as zero-drift, poor anti-interference property and instability of test system can’t meat wheel/rail force test requirements in high-speed railways. A method based on PVDF piezoelectric sensing technology is presented for the test of wheel/rail contact force. Firstly, on the basis of the theory of vehicle-track coupling dynamics and by means of simulation software ADAMS/Rail, a three-dimensional train-track simulation model is established. Secondly, the modes and characteristics of wheel/rail impact vibrations due to non-roundness of railway wheels are investigated in high-speed railway operation. The relationship between the range for acceptable roundness values and vehicle speed is determined. Finally, the view that it is of important significance to establish wheel/rail force real-time monitoring system is expanded, so that abnormal conditions caused by out-of-round wheels can be detected in time, to ensure high-speed railway traffic safety. The study is very important for enhancing the stability and economy signification of rail transmission.

• Periodical: Applied Mechanics and Materials (Volumes 178-181)
• Pages: 1125-1130
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.178-181.1125
• Online since: May 2012
• Authors: Zhi Chen Wang, Ying Song, Ying Ming Shen
• Keywords: High-Speed Railway (HSR), PVDF Piezoelectric Sensing, Wheel/Rail Contact Force Measurement

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