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Characteristics of Track Irregularities on Kyoungbu High-speed Line

경부고속선 궤도틀림 분포특성

  • Choi, Il-Yoon (Advanced High-speed Railroad Systems Research Division, Korea Railroad Research Institute) ;
  • Lee, Jun S. (Advanced High-speed Railroad Systems Research Division, Korea Railroad Research Institute) ;
  • Um, Ju-Hwan (Future Transportation Systems Research Division, Korea Railroad Research Institute) ;
  • Kang, Tae-Ku (Korail) ;
  • Choi, Min-Ji (Advanced High-speed Railroad Systems Research Division, Korea Railroad Research Institute)
  • Received : 2015.01.16
  • Accepted : 2015.02.11
  • Published : 2015.02.28

Abstract

Track irregularities have a strong influence on the safety and the ride comfort of trains as well as track maintenance work. A statistical analysis was conducted for track irregularities data measured in Kyoungbu high speed line using a track recording car(EM120). First, the characteristics of EM120, which adopted versine measurement system, were investigated and the transfer function of EM120 was examined. The distributions of the surface and the alignment which have short wavelength were considerably high and the distribution decreased as wavelength increases. A distribution analysis of the wavelength was carried out according to EN standards and most of the track irregularities were in a D1 wavelength range. The distributions of the amplitude of track irregularities were also investigated and the results show that the distributions of track irregularities decrease rapidly as amplitude increases. These results may be helpful in making track maintenance plans and revising track irregularities criteria.

궤도틀림은 철도차량의 주행안전성과 승차감에 영향을 미칠 뿐만 아니라 유지보수와 밀접한 관계가 있다. 본 논문에서는 경부고속철도 개통 이후 경부고속선 구간에서 검측된 궤도틀림에 대하여 통계분석을 수행하였다. 우선, 궤도틀림 검측에 사용된 검측차(EM120)의 검측특성, 즉 현정시법 검측원리를 사용하는 경우에 대한 파장대역별 전달함수 특성을 조사하였다. 고저틀림과 방향틀림에 대한 파장의 분포 특성 분석결과에 의하면, 단파장의 파장대역의 분포비율이 상당히 높았으며 파장이 길어질수록 발생빈도는 감소하는 경향을 보였다. EN규정에서 규정하고 있는 파장대역별로 구분하여 분포 현황을 조사한 결과는 D1 영역의 분포비율이 대부분을 차지하고 있는 것으로 파악되었다. 또한, 궤도틀림 항목별로 궤도틀림 크기에 따른 분포 특성을 조사하였으며, 궤도틀림의 크기가 증가할수록 발생빈도는 급격히 감소하는 경향을 보였다. 이러한 궤도틀림 분포 특성에 대한 조사결과는 궤도틀림 유지보수 계획수립 및 궤도틀림 기준설정을 위한 기초자료로 유용하게 사용될 수 있을 것으로 예상된다.

Keywords

References

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