Experimental study on test of wheel-rail impact based on iron plate strain of fastener system

The wheel-rail impact load can reach up to 3–4 times the normal wheel load, with two peaks including a high-frequency impact force (P₁) and a mid-frequency or quasi-static impact force (P₂). To effectively monitor the wheel-rail impact, this study utilizes strain gauges adhered to bottom of iron plates of fastener to measure rail-seat force, and conducts indoor static load and wheel-drop tests. A finite element model is established for verification and analysis. By analyzing the transmission law of the wheel-rail impact, a monitoring method through rail-seat force is proposed. The results reveal that the strain change of the iron plate in the static load test remains stable and exhibits a linear relationship with rail-seat force. Through a full-scale wheel-drop test, it demonstrates that rail-seat force can effectively monitor P₂ force of wheel-rail impact. Compared to traditional method of directly adhering strain gauges to rail, the method of adhering strain gauges to iron plate enabled wheel-rail impact invalid test sections measurement. The peak value of wheel-rail impact P₂ can be deduced from peak value of rail-seat force under different impact location, impact levels, and elastic pad stiffness. The proposed monitoring method of based on fastener iron plate strain offers a more efficient alternative for identifying wheel defects and rail defects.

• Record URL:
  • https://doi.org/10.1016/j.conbuildmat.2024.137804
• Record URL:
  • http://www.sciencedirect.com/science/article/pii/S0950061824029465
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09500618
• Supplemental Notes:
  • © 2024 Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies. Abstract reprinted with permission of Elsevier.
• Authors:
  • Lan, Caihao
  • Niu, Xinyu
  • Zhu, Wenjin
  • Yi, Haonan
  • Li, Zhuohang
  • Yang, Rongshan
• Publication Date: 2024-9-27

Language

• English

Media Info

• Media Type: Web
• Features: References;
• Pagination: 137804
• Serial:
  • Construction and Building Materials
  • Volume: 445
  • Issue Number: 0
  • Publisher: Elsevier
  • ISSN: 0950-0618
  • Serial URL: http://www.sciencedirect.com/science/journal/09500618?sdc=1

Subject/Index Terms

• TRT Terms: Ballastless track; Finite element method; Rail fasteners; Rolling contact; Strain gages; Tie plates
• Subject Areas: Maintenance and Preservation; Railroads;

Filing Info

• Accession Number: 01932145
• Record Type: Publication
• Files: TRIS
• Created Date: Sep 27 2024 1:48PM