数据驱动下地铁刚性接触网动态评价标准研究OA

A new data-driven method for standard construction was proposed to address the lack of evaluation criteria for the dynamic inspection of metro rigid catenary systems.First,based on massive dynamic testing,data from national railway lines and metro lines at the same speed level were obtained,and a single-point defect threshold criterion was formulated according to the amplitude,kernel density,cumulative distribution characteristics,and differences of parameters for flexible and rigid catenary systems.Second,a mapping curve between intra-span parameters and the in-service state of the national railway was fitted,and the section evaluation function was adaptively modified based on the distribution characteristics of intra-span dynamic data of the metro at different speed levels.Then,considering the in-service characteristics of the rigid catenary system,including low elasticity,severe wear,and high traction current,the weights of each evaluation indicator were determined,and the section in-service state evaluation management values at each speed level were calculated.Finally,the proposed method and the traditional section evaluation function for flexible catenary were applied to the calculation of the metro section performance index,respectively.The results showed that the performance index distribution obtained by the proposed data-driven method covered a wider range and more accurately reflected the evolution pattern of the real in-service state,and the performance index was uniformly distributed within the range of 0～10.