Journal of the Korean Society for Railway (한국철도학회논문집)

The Korean Society for Railway (한국철도학회)
권호 표지
DOI QR코드

DOI QR Code

Analysis for Optimal Rail Grinding Amount by Rolling Contact Fatigue Test in High Speed Railway

구름접촉피로시험을 통한 고속철도 레일연마량 분석

  • 성덕룡 (대원대학교 철도건설과) ;
  • 장기성 (서울과학기술대학교 철도전문대학원) ;
  • 박용걸 (서울과학기술대학교 철도전문대학원)
  • Received : 2011.12.13
  • Accepted : 2012.01.30
  • Published : 2012.04.30
Download PDF
⟨ Previous Next ⟩

Abstract

The rail surface defects which are generated on repeated rolling contact fatigue are getting increased according to high speed, high density, and minimum weight. In addition, Increasing noise and vibration are affected by these also impact load generated as well. Because of this phenomenon, more serious and critical damages were occurred. In fact, in order to control them, the rail grinding amount in Korea. This study evaluated how depth of hardening on rail surface is formed and suggested optimal rail grinding amount by RCF(rolling contact fatigue) test with generated contact pressure between KTX wheel and UIC60 rail by applying FEM analysis. Therefore, the amount was generated approximately 0.2mm/20MGT to maintain integrity of rail surface by getting rid of depth of hardening on rail according to rail accumulated passing tonnage.

차륜과 레일의 반복적인 구름접촉은 레일 표면결함을 유발하고, 레일 표면결함은 충격하중을 유발하여 소음 진동, 레일파단, 궤도파괴로 이어지고 심할 경우 열차사고(탈선)를 발생할 수 있다. 이러한 레일 표면결함을 제어하기 위한 방법으로 레일연마가 시행되고 있다. 본 연구는 KTX차륜과 UIC레일에서 발생하는 최대 접촉압력을 유한요소해석을 통해 산정하였고, 일반레일 및 열처리레일에 대한 구름접촉피로시험을 수행하여 접촉압력 및 반복횟수에 따른 레일표면 경화층 형성 경향을 분석하였으며, 누적통과톤수에 따라 고속철도 레일에서 발생하는 표면 경화층을 제거하여 건전한 레일표면을 유지하기 위해 0.2mm/2천만톤의 적정 레일연마량을 제안하였다.

Keywords

References

  1. M. C. Kim (2006) The Report for Establishment of Rail Grinding Criteria, KRRI, Korail.
  2. M. Ishida (1999) Experimental study on the effect of preventive grinding on RCF defects of Shinkansen rails, IHHA'99 STS-conference, pp. 511-516.
  3. M. C. Kim, T. K. Kang (2008), Rail Grinding Criteria of Kyeong-Bu High-Speed Line for Effective Rail Maintenance, Journal of the Korean Society for Railway, 11(3), pp. 272-279.
  4. D. Y. Sung, D. C. Go, Y. G. Park, S. Y. Kong (2010) Experimental Study for Establishing Rail Grinding Period in the Urban Railway, Journal of the Korean Society for Railway, 13(4), pp. 447-454.
  5. Coenraad Esveld (2001) Modern Railway Track, MRT-Productions, pp. 23-33, pp. 71-90.
  6. H. Y. Choi, D. H. Lee, W. H. You, J. S. Lee (2010) Wheel-Rail Contact Analysis considering the Deformation of Wheel and Axle, Journal of the Korean Society of Precision Engineering, 27(8).

Cited by

  1. Non-contact Local Fault Detection of Railroad Track using MFL Technology vol.14, pp.5, 2014, https://doi.org/10.9798/KOSHAM.2014.14.5.275