An Effect on Braking Force for Degradation of Rail Surface in the Urban Railway

도시철도에서 열차제동하중이 레일표면 열화에 미치는 영향

  • 양태경 (서울과학기술대학교 철도전문대학원) ;
  • 오희완 (서울메트로 철도토목처) ;
  • 성덕룡 (대원대학 철도건설과) ;
  • 최진유 (한국철도기술연구원 차륜궤도연구실) ;
  • 박용걸 (서울과학기술대학교 철도전문대학원)
  • Published : 2011.10.20

Abstract

The rail surface irregularity is generated severely by train braking effect in the section of station. The braking force increases slip rate and friction factors caused by wheel-rail contact points. It brings rail surface irregularity as well. In this study, interactions between wheel and rail were investigated using rolling contact fatigue theory and mechanism of rail degradation through fracture mechanics. For the more, the Von-Mises stress occurred on the rail due to the interaction between wheel and rail was analyzed using 3-D finite element method. The amounts of surface irregularity of rail were measured according to accumulated passing tonnage in urban railway in fields. Therefore, the maintenance of rail should be separated by running and braking sections to prevent RCF defects.

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