Research and Practice on Condition Assessment Methods for Urban Rail Transit Electromechanical Equipment

In recent years, the development of urban rail transit across China has entered a brand-new development stage, which has successfully transformed its development focus from extensive large-scale infrastructure construction in the early stage towards refined, efficient and high-quality daily operational management. With the continuous extension of service life of operational rail lines, coupled with diversified practical constraints including inconsistent operation and maintenance technical standards among different depots, insufficient supply channels and procurement obstacles of core and special spare parts, as well as complex and harsh on-site operating environments, various types of aging and performance degradation problems have gradually emerged in in-service rail transit equipment. These prevalent equipment defects inevitably pose potential threats to the stable and safe operation of passenger trains, and also greatly restrict the overall improvement of daily passenger travel experience and public transport service quality. Against this background, targeted regular maintenance, timely fault repair and scientific technical renovation of old equipment have become urgent practical demands. Hence, carrying out objective, systematic and rational comprehensive evaluation on the actual service condition of existing rail transit equipment is of great practical significance, which can supply solid data support and scientific decision-making basis for relevant administrative and management departments. This paper selects the platform screen door equipment of urban rail transit Line 1 in a typical city as the specific research object. By adopting combined research methods including historical operational data sorting, field actual inspection and professional performance testing, this study establishes a multi-dimensional comprehensive evaluation system covering eight core indicators, namely equipment functional efficiency, operational adaptation satisfaction, management system standardization, maintenance process compatibility, operation and maintenance working status, potential risk hidden danger rectification effect, spare parts supply guarantee capacity and on-site operating environment conformity. Finally, definite targeted evaluation results and practical improvement suggestions are summarized. The established evaluation framework and technical methods in this research can offer reliable practical reference and effective technical guidance for peers and front-line staff engaged in urban rail transit facility condition assessment and daily management work.