Application Practice of Adjusting Rigid Catenary Sinusoidal Wave Stagger Value to Ameliorate Abnormal Pantograph-catenary Wear in Operating Line

Abstract

Objective The early-designed rigid catenary system for urban rail transit lines in China adopts a sinusoidal wave arrangement method, leading to a prevalent abnormal wear of PC (pantograph-catenary) during operation. Under the constraints of main-line track zone construction conditions, the operating lines are not susceptible to large-scale renovations, prolonging the resolution of this issue, a research on the optimization and adjustment measures is needed. Method By calculating the sliding friction distance between each pantograph surface calculation section and catenary under the arrangement method of sinusoidal wave stagger value, a statistical analysis of the percentage of sliding friction distance for each calculation section is performed. Three reasons causing pantograph abnormal wear are identified. Considering the layout of positioning points on operating lines, the stagger value data is adjusted, and optimization measures are proposed for these three reasons in sequence. A comparison of sinusoidal wave stagger values before and after optimization is conducted, followed by an analysis of the effectiveness of the optimization and adjustment measures. Result & Conclusion In comparison with the stagger value of original sinusoidal wave arrangement method, the maximum multiple of pantograph wear decreased from 6.23 times to 1.47 times in the stagger value of optimized arrangement method, and the average multiple of pantograph wear reduced from 3.52 times to 1.08 times. After implementing these optimization measures in some sections of Xi’an Metro Line 2, no noticeable pantograph abnormal wear is observed within two years, and the current collection quality remains excellent.

Keywords

• urban rail transit
• rigid catenary
• pantograph-catenary abnormal wear
• sinusoidal wave stagger value