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이지하(Lee Jeeha),최유복(Choi You Bok) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
Track geometry changes by traffic loads. The bigger the changes are, the worse the riding comfort and running stability of train. This is so-called track irregularity and is the most important quality parameters of ballasted track. To objectively assess track irregularity, track geometry should be able to be measured. Practically, railway companies use moving chord method, which determine versine values via a chord. The versine is vertical distance to curve measured in the middle of the chord. In this report, reviewed conventional methods for track maintenance using output data of EM-120 track recording car categorized with by single failure, quality index and progress rate. And briefly reviewed technical background of track maintenance threshold and TQI(Track Quality Index) for track irregularity. For the last, proposed effective way of using track irregularity data for track maintenance.
이지하(Jeeha Lee),나성훈(Sung Hoon Na),김박진(Bag Jin Kim),최유복(You Bok Lee) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Track geometry changes by traffic loads. The bigger the changes are, the worse the riding comfort and running stability of train. This is so-called track irregularity and is the most important quality parameters of ballasted track. To objectively assess track irregularity, track geometry should be able to be measured. Practically, railway companies in Korea use normal distribution as probability distribution of track irregularity. But some countries use non-normal distribution according to their own track recording system. In this report, reviewed probability distribution of Kyung-Bu high-speed line and tested normality.