Analysis on the Evolution Characteristics of Rail Corrugation on a Metro

doi:10.3901/JME.2018.04.070

Abstract

Abstract: The formation cause of short-pitch rail corrugation occurred on a Guangzhou metro line is studied. Firstly, the characteristics of the corrugation are investigated through field measurement and observation. Besides, the rail roughness at another Guangzhou metro line with the same of vehicles and operation conditions is also measured and analyzed. Then, a numerical model combined the wheelset-track interaction and rail wear model is established. Based on the receptance of tracks measured by the hammer excitation technique, the rail wear rate in the frequency domain is calculated during the vehicle running at a curve with radius of 800 m. The investigated result indicates:① Tracks consist of GJ-Ⅲ elastic and DTVI traditional fasteners. Corrugations with wavelength of 30~40 mm have occurred at large radius curves. The operating speed of vehicle in corrugated tracks is about 80~90 km/h and the passing frequency of corrugations is 625~833 Hz. The high-frequency wheelset resonance is not related to the formation of the corrugation. ② The rail wear rate appears large at the 1030~1130 Hz and 620~840 Hz, which can results in the corrugation with wavelengths of 22~24 mm and 28~40 mm. This numerical result coincides with the result of field measurement. ③ The vertical characteristics of tracks with lower value of receptance at 620~830 Hz are the main cause of the short-pitch rail corrugations.

Key words: frequency domain, Metro, rail wear rate, short-pitch rail corrugation, track receptance

CLC Number:

U211.9

LI Wei, WEN Zefeng, WANG Hengyu, ZHAO Xin, WANG Peng. Analysis on the Evolution Characteristics of Rail Corrugation on a Metro[J]. Journal of Mechanical Engineering, 2018, 54(4): 70-78.

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