• Title, Summary, Keyword: 선형개량

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미국 선형심사 연수를 마치고

  • 윤현상
    • 종축개량
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    • v.19 no.1
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    • pp.68-84
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    • 1997
  • 한달 간의 미국선형심사연수를 받으면서 교육받은 선형심사 대상형질의 중요성을 설명하고 미국목장을 직접 방문하면서 피부로 느낀 미국 낙농가들의 긍지와 자부심 및 낙농박람회 일정을 소개하고자 한다.

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Evaluation of Optimal Horizontal Alignment Considering Ride Comfort in Renewal of Curved Tracks (곡선부 선형개량 시 승차감을 고려한 최적평면선형 평가)

  • Um, Ju-Hwan;Choi, Il-Yoon;Lee, Jun S.
    • Journal of the Korean Society for Railway
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    • v.18 no.5
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    • pp.457-465
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    • 2015
  • A method of evaluating the optimal alignment range while considering ride comfort when performing line renewal of curved tracks for speed-up is proposed in this study. The proposed method was applied to analyze the optimal renewal range for horizontal alignments with the smallest curve radii in the Kyung-Bu high-speed line; a parametric study on the effects of various initial design conditions on the permissible renewal range and optimal alignment range was also performed. From the analysis results, it was found that the permissible range is enhanced in proportion to the increase in the curve radius and the cant. It was also verified that a slight adjustment of the horizontal alignment enables speed-up even in the case of R7000/R8000, placed in the ballasted track section of the Kyung-Bu high-speed line.