Highland railway operational safety system resilience evaluation based on combined weighting-Euclid distance

In the highland railway operating system, a comprehensive engineering system, the operational safety system was a priority. To study the factors affecting the safety of railway operation in the plateau region, and guarantee the safety of the railway system during operation while evaluating its safety, the theory of resilience can be introduced into the evaluation system of safety system during the operation period, based on which the concept of resilience of safety system during the operation in the highland railway was proposed. Also, focusing on the characteristics of railway in plateau region, a resilience evaluation index system of the safety system during railway operation in plateau region was established, which contained management system, personnel system, environment system and material system. In addition, the connection between evaluation indicators and process attributes was established by combining the process attributes of resilience dynamic evolution which includes adaptability, resistance and resilience. In order to solve the issue of qualitative and quantitative in the index, the combination weighting of resilience evaluation index was carried out. The resilience level of safety system during operation in plateau region railway was quantified by Euclid distance. It is found that in the primary indicators, the environmental system has the highest proportion. Among the secondary indicators, the seismic intensity has the greatest influence on the overall resilience level. This means the indicators in the environmental system should be focused on, and higher attention should be paid to the sections with higher seismic intensity. A section of the Qinghai-Tibet Railway is selected as an engineering example, after evaluation, the results show that the resilience situation of the example project is in basic resilience. According to the conclusion, the resilience improvements could be made in terms of both the indicator situation and the process attributes for its characteristics. The combination weighting-Euclid distance-based evaluation of the resilience of railway safety systems during operation in plateau region may provide a new way of thinking for the evaluation of railway safety during operation in plateau region, which can be used to make judgments on the actual engineering resilience situation. © 2023, Central South University Press. All rights reserved.