문화기술의 융합 (The Journal of the Convergence on Culture Technology)

  • 제10권3호
  • /
  • Pages.845-849
  • /
  • 2024
  • /
  • 2384-0358(pISSN)
  • /
  • 2384-0366(eISSN)
국제문화기술진흥원 (The International Promotion Agency of Culture Technology)
권호 표지
DOI QR코드

DOI QR Code

열차주행특성을 고려한 레일표면결함 분석

Evaluation of Rail Surface Defects Considering Vehicle Running Characteristics

  • 최정열 (동양대학교 건설공학과)
  • Jung-Youl Choi (Dept. of Construction Engineering, Dongyang University)
  • 투고 : 2024.03.15
  • 심사 : 2024.04.20
  • 발행 : 2024.05.31
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

현재 도시철도 레일의 노후화로 인한 레일표면결함이 증가하고 있으나 국가에서 제정된 궤도성능평가에 관한 세부지침에서 레일표면손상을 기술자의 육안, 간단한 측정 도구로 점검을 수행하는 실정이다. 주기적인 선로순회작업 및 육안점검을 통해 레일표면의 결함을 발견하는 것은 매우 중요하다. 그러나 점검자의 주관적 판단에 의해 레일표면의 결함의 경중을 평가하는 것은 레일 내부의 손상을 예측하기에 상당한 제약이 따른다. 본 연구에서는 레일표면손상에 따른 레일내부 균열특성에 관한 연구로서 현장측정에서는 레일표면 손상개소를 선정하여 가속구간 및 제동구간의 노후레일 시료를 채취하여 레일표면손상 상태를 평가하고자 전자주사현미경(SEM)을 이용하여 균열특성을 분석하였다. 분석결과, 주행 중인 열차로 인해 발생하는 균열 메커니즘과 레일표면방향으로 올라오는 각도로 균열이 발생하는 가속구간의 균열특성을 실험적으로 입증하였다.

Currently, rail surface defects are increasing due to the aging of urban railway rails, but in the detailed guidelines for track performance evaluation established by the country, rail surface damage is inspected with the naked eye of an engineer and with simple measuring tools. It is very important to discover defects in the rail surface through periodic track tours and visual inspection. However, evaluating the severity of defects on the rail surface based on the subjective judgment of the inspector has significant limitations in predicting damage inside the rail. In this study, the characteristics of cracks inside the rail due to rail surface damage were studied. In field measurements, rail surface damage was selected, old rail samples were collected in the acceleration and braking sections, and a scanning electron microscope (SEM) was used to evaluate the rail surface damage was used to analyze the crack characteristics. As a result of the analysis, the crack mechanism caused by the running train and the crack characteristics of the acceleration section where cracks occur at an angle rising toward the rail surface were experimentally proven.

키워드

과제정보

이 논문은 2023년도 동양대학교 학술연구비의 지원으로 수행되었음

참고문헌

  1. Guidelines for regular inspection of railway facilities, etc., Ministry of Land, Infrastructure and Transport, 2021
  2. Detailed guidelines on performance evaluation of track facilities, Korea National Railway, 2021
  3. J.Y. Choi, H.S. Gong, J.H. Kim, H.S. Kim and J.S Chung. "An Experimental Study on Causes Evaluation of Rail Corrugation for Concrete track(STEDEF) in Urban Transit", The Journal of the Convergence on Culture Technology (JCCT), Vol. 4, No. 4, pp. 413-418, 2018. https://doi.org/10.17703/JCCT.2018.4.4.413
  4. J.Y Choi, J.M. Han, Y.K. Kim, "Correlation Analysis of Rail Surface Defects and Rail Internal Cracks", The Journal of the Convergence on Culture Technology (JCCT), Vol. 10, No. 1, pp.585-591, 2024. http://dx.doi.org/10.17703/JCCT.2024.10.1.585
  5. J.Y. Choi, C.M. Jung, J.S Chung. "Experimental Study to analyze Effect of Rail Corrugation Reduction according to Rail Grinding", The Journal of the Convergence on Culture Technology (JCCT), Vol. 7, No. 4, pp. 413-418, 2021. http://dx.doi.org/10.17703/JCCT.2021.7.4.801
  6. Kapoor, A, Schmidt, F, and Fletcher, D, "Managing the critical wheel-rail interface", Railway Gazette International, 2002
  7. B. Trolle, S. H. Mai, A. Gravouil, M.-C. Baietto, B. Prabel, M.-L. Nguyen-Tajan, Crack propagation under RCF accounting for actual residual stresses in the rail, World Congress of Rail Research (WCRR), 2013
  8. B. NDAO, Generation et Detection sans Contact des ondes depayleigh par methodes ultrasons-Laser et EMAT Mode Statique et Dynamic Application to the detection of surface defects in the rail head, University of Valenciennes and Hainaut-Cambresis, Ph.D dissertation, 2016
  9. Track Inspector Rail Defect Reference Manual, FRA, 2011
  10. S.L. Grassie, "Rail Corrugation: Characteristics, Cause and Treatments", Proceeding I MechE Part F: Journal of Rail and Rapid Transit, Vol. 223, pp. 1-17, 2009. https://doi.org/10.1243/PIME_PROC_1993_207_227_0