Reliability analysis of metro vehicles operating in Poland

Rafał Melnik , Seweryn Koziak , Bogdan Sowiński , Andrzej Chudzikiewicz

Abstract

Reliability of the metro vehicles is a key factor for providing of regular, safe and undisturbed passenger transport in the urban agglomerations. The research contains failure analyses of the two types of metro vehicles, and comparison of their reliability functions. Data on damages of the metro rail vehicles have been obtained in the form of complaint protocols. Having extracted the damages from the same protocols the next step was to allocate in the established groups. The two subgroups have been created: mechanical and electrical failures. The results of analysis have shown that the rolling stock of two types is subject to a significant number of damages in the initial phase of exploitation. Among vehicles of the same type there are differences in number of damages of one kind (mechanical or electrical) and considered damage group.