Proceedings of the KSR Conference (한국철도학회:학술대회논문집)

The Korean Society for Railway (한국철도학회)
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Analysis for Optimal Rail Grinding Amount by Rolling Contact Fatigue Test in High Speed Railway

구름접촉피로시험을 통한 고속철도 레일연마량 분석

  • 장기성 (서울과학기술대학교 철도전문대학원) ;
  • 성덕룡 (대원대학 철도건설과) ;
  • 박용걸 (서울과학기술대학교 철도전문대학원) ;
  • 최진유 (한국철도기술연구원) ;
  • 이동형 (한국철도기술연구원)
  • Published : 2011.10.20
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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 were conducted. However, there are not enough researches to make an criteria of generating optimal 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.

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