基于状态监测的城市轨道交通弓网健康度评价方法OACSTPCD

In order to improve the safety and reliability of urban rail transit operation,a comprehensive health assessment system was constructed based on condition monitoring technology.Firstly,the mecha-nism of the pantograph-catenary system was elaborated in detail,the health assessment was intro-duced,and the characteristics of pantograph-catenary health were analyzed.Secondly,the key factors affecting the operation status of pantograph-catenary system were identified,and a pantograph-catena-ry health evaluation index system was established from two dimensions:monitoring parameter indica-tors and appearance status indicators.Then,the weights of each indicator were determined through the Analytic Hierarchy Process,and a 4-level health evaluation standard was constructed.Finally,to verify the effectiveness of the evaluation system,a case study was conducted on an urban rail transit line that had been in operation for over 5 years in Shenyang.The results showed that the health scores of each section ranged from 80.1 to 95.5,with a failure rate of 0.008%to 0.031%;the higher the health score,the lower the failure rate,and there was a clear negative correlation between the two.The research re-sults confirm the usability and effectiveness of the pantograph-catenary health evaluation index system in monitoring multidimensional data and reflecting potential risks of the system.The proposed evalua-tion method can comprehensively and accurately reveal the operating status of pantograph-catenary system,providing reliable basis for pantograph-catenary maintenance decisions.