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우병구(Woo Byoung-koo),이승열(Lee Syeung-Yeol),김명수(Kim Myung-soo),이성욱(Lee Sung-uk) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
Rail is one of major track components for train service, it should be provided in the condition of flat and smooth driving aspect. Therefore, it is inevitable that there would be the field welding to integrate on CWR(Continuous Welded Rail) removing rail joint in these days. It is high chance to be some rail surface irregularity due to the limitation on the status of work condition If a high speed train runs on the rail surface irregularity in the welding part, big impact load comes to pass on that, so track irregularity cycle is reduced, therefore track maintenance cost can be increased. this paper has analyzed wheel load variation according to removing the rail surface irregularity using portable grinding machine in the high speed line. The result measured before and after in the field is decreased about 9.26% on the wheel load variation.
김남홍(Nam-Hong Kim),이승열(Syeung-Yeol Lee),우병구(Byoung-Koo Woo),김명수(Myung-Su Kim),이성욱(Sung-Uk Lee) 한국철도학회 2010 한국철도학회 학술발표대회논문집 Vol.2010 No.7
We should manage the target locations according to the deterioration degree of the ballast for the rational and economical ballast cleaning. For this, it's required to define the logics calculating the crushing rates and suggest the threshold values for the ballast cleaning. This paper introduce the system modules that estimate the ballast's deterioration degree refers to the results of the previous study("A Study on the Crushing Characteristic of the Ballast Gravel at High-Speed Railroad", Journal of the Korean Society for Railway, Vol.11, No.4, pp.384~389), enroll the target locations where the ballast cleaning is required.
김남홍(Kim Nam-Hong),이승열(Lee Syeung-Yeol),우병구(Woo Byoung-Koo),김명수(Kim Myung-Su),이성욱(Lee Sung-Uk) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.11월
In order to forecast the progress of the track irregularity, we should observe the long-term track quality and divide a track into some separated divisions which have homogeneous property. For this, we define the division of track which has homogeneous property as a ‘Segment’ and manage the ‘TQI(Track Quality Index)’ using track induction data based on each segment. This paper introduces some methods for estimating track quality using track induction data and suggests a appropriate method at high-speed railroad through comparative analysis of TQI data.
김남홍(Kim Nam-Hong),이승열(Lee Syeung-Yeol),원용환(Won Yong-Hoan),김관형(Kim Kwan-Hyung),이성욱(Lee Sung-Uk) 한국철도학회 2009 한국철도학회 학술발표대회논문집 Vol.2009 No.5월
In order to forecast the progress of the track irregularity, we should observe the long-term track quality and divide a track into some separated divisions which have homogeneous property. For this, we define the division of track which has homogeneous property as a ‘Segment’ and manage the ‘TQI(Track Quality Index)’ using track induction data based on each segment. In this study, we introduce some methods of estimating track quality and figure out the TQIs of sample section using new FRA TQI method. In addition, we conducted a basic study of the forecasting model for the progress of track irregularity by analyzing track maintenance data.