Diagnostic Evaluation for Structural Deformation of Overage Railway Vehicles

초록

It is regulated that all railway vehicles have the term of operation of their own in the railway safety law of Korea, where 30 years for high speed train and freight wagon, 25 years for metro including light rail and passenger rolling stock, and 20 years for locomotives. The safety diagnosis shall be done to extend the term of operation, which contains dimension measurement and nondestructive inspection of car body and bogie frame, electric characteristics of high voltage lines, running performance (acoustic noise, ride comfort and vibration), and estimate of expected life cycle. On the basis of diagnostic results, the designated institute for the safety diagnosis issues the certificate to extend the term to 15 years on the basis of the diagnostic results. For passenger rolling stock approaching to the term of operation, in this paper, structural deformations were measured and analyzed statistically in car bodies and bogie frames. Considering deformation characteristics, qualitative methodology was proposed to estimate if passenger rolling stocks have structural robustness to extend the term under.