Rail corrugation characteristics in small radius curve section of Cologne-egg fasteners
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DOI 10.1007/s12206-020-1010-x
Journal of Mechanical Science and Technology 34 (11) 2020 Original Article DOI 10.1007/s12206-020-1010-x Keywords: · Corrugation · Cologne-egg fastener · Dynamics · Modal analysis · Railway tracks · Wear development
Correspondence to: Zhiqiang Wang [email protected]
Citation: Wang, Z., Lei, Z. (2020). Rail corrugation characteristics in small radius curve section of Cologne-egg fasteners. Journal of Mechanical Science and Technology 34 (11) (2020) 4499~4511. http://doi.org/10.1007/s12206-020-1010-x
Received April 27th, 2020 Revised
July 7th, 2020
Accepted August 12th, 2020 † Recommended by Editor Chongdu Cho
Rail corrugation characteristics in small radius curve section of Cologne-egg fasteners Zhiqiang Wang1,2 and Zhenyu Lei1,2 1
2
Institute of Rail Transit, Tongji University, Shanghai, China, Shanghai Key Laboratory of Rail Infrastructure Durability and System Safety, Shanghai, China
Abstract
The typical passing frequencies of corrugation were obtained by analysing the measured corrugation data in small radius curve track with Cologne-egg fasteners. The threedimensional solid element model of track structure was established with the software ABAQUS, and modal analysis was carried out to determine the relationship between natural frequencies of track structure and passing frequencies of corrugation. By using the material wear model based on friction work theory, the frequency characteristics of corrugation and the development law of wear under different speeds were studied, and the control measures of corrugation were analysed. The new point of this study is to implement the above dynamic analysis from the perspective of vehicle (with flexible wheelsets) track space coupling, which can consider the coupled relationship in three directions of space. The results show that the generation of corrugation is closely related to the mechanical characteristics of track structure. Passing frequencies do not change with speeds, reflecting the frequency-fixing characteristics of corrugation. The analysis of control measures of corrugation shows that the smaller the friction coefficient is, the less likely the rail is to produce corrugation. The existence of rail vibration absorber can eliminate the generation of some short wavelength corrugation and reduce the rail bending vibration, which has a significant effect on the control of corrugation.
1. Introduction
© The Korean Society of Mechanical Engineers and Springer-Verlag GmbH Germany, part of Springer Nature 2020
The rise of urban rail transit brings convenience to residents, but it inevitably produces environmental pollution problems such as vibration and noise. Therefore, various vibrationabsorbing tracks are widely used in sensitive areas such as residential buildings, hospitals and schools. The Cologne-egg fastener track was developed in Germany and applied to Cologne metro for the first time. Because its shape is similar to that of an egg, it is called the Cologneegg fastener, as shown in Fig. 1. The Cologne-egg fastener
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