Citation

Zhang M. China Saf. Sci. J. 2022; 32(6): 163-170.

Copyright

(Copyright © 2022, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2022.06.0947

PMID

unavailable

Abstract

In order to effectively control risks of metro operation, a cloud modeling method and combination weighting technology were introduced, and a risk assessment model was established considering features of metro operation safety. With a subway line in Xi＇an is as research background, a three-level index system of risk evaluation was constructed, and comprehensive weight coefficients of each index were determined based on Euclidean distance combination and by using G1 method and EW method. Secondly, based on quantitative grading criteria of each index, numerical characteristics of clouds were determined and cloud maps were generated by utilizing Matlab. Finally, certainty degree of indexes was determined through forward cloud generators. The results show that the proposed risk assessment model can not only reduce subjective randomness, but also eliminate single objective error. Safety risk levels of Ｔ1-Ｔ4 operating lines under its jurisdiction are medium (Ｖ3), low (Ｖ2), low (Ｖ1) and medium (Ｖ3), which are in good agreement with actual evaluation results. © 2022 China Safety Science Journal. All rights reserved.

Language: zh