Research on Maintenance Management Technology of Track Irregularity of High Speed Railway
This paper aims to analyze and study the outstanding problems that exist in high-speed trains while they are in motion. It analyzes the impact of track irregularity and the interaction of vehicle wheels on the magnitude, the size of wavelength and the resonance frequency of the high-speed trains; it studies the types of track irregularity, and after the data are correctly measured concerning the variety of track irregularity, scientific evaluation will be made about the status of the track irregularity. Statistical indicators of irregularity amplitude such as the rail mass index will be used to prepare a track segment of 250 meters long characterized with continuous irregularity, using the composite index collected through dynamic checks concerning the height, direction, distance, level and distortion of the rails, taking 250 meter-long line segments as the basic length unit for track regularity assessment, judgment and maintenance; then all kinds of irregularity will be measured and evaluated with the standard deviation of this basic length unit, wherever standard deviation exceeds the allowable limits, the state will be determined as bad, and regardless of the extent of the track irregularity of the individual sites, they should all be repaired. In that way the statistical features of seriously irregular segments would be made prominent, enabling the scientific balance of the segments that need maintenance.