4.6 Article

Experimental and simulation investigation into the cause and treatment of rail corrugation for metro

期刊

JOURNAL OF CENTRAL SOUTH UNIVERSITY
卷 29, 期 12, 页码 3925-3938

出版社

JOURNAL OF CENTRAL SOUTH UNIV
DOI: 10.1007/s11771-022-5179-2

关键词

rail corrugation; modal analysis; field measurement; fastener stiffness; finite element model

资金

  1. National Natural Science Foundation of China [52178405]
  2. Project of Beijing Municipal Science & Technology Plan, China [Z191100002519010]
  3. Fundamental Research Funds for the Central Universities, China [2018JBZ003, 2020JBZD013]

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The cause and treatment of rail corrugation for the metro have been investigated in this study through field measurements and finite element modeling. Increased stiffness of fasteners and grinding of rails were found to be effective measures in suppressing rail corrugation.
The cause and treatment of rail corrugation for the metro have always been a popular and challenging issue. In this work, the field measurements were carried out on rail corrugation, track stiffness, and the track dynamic response. A three-dimensional finite element model was developed to investigate the cause of rail corrugation. The constraints on rail vibration from two wheelsets and adjacent wheel-rail interactions were taken into account in the model. According to experimental and simulation results, the suppression measure for rail corrugation was proposed and the suppression mechanism was discussed. It was found that the cause of rail corrugation is related to vertical and lateral vibration of the rails outside the two wheelsets at around 380 Hz. The increased stiffness of the fasteners reduces the vibration energy of the rail and the wheel-rail force. However, simply increasing the stiffness of the fasteners may not be effective in the suppression of rail corrugation. If necessary, the rails need to be grinded to reduce the roughness to a certain level, so that increasing the fastener stiffness can effectively suppress the rail corrugation.

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