Resilience Assessment and Recovery Strategy for High-Speed Railway Networks Considering Spatiotemporal Dynamic Characteristics

Abstract

The service link in a high-speed railway (HSR) network has an evident temporal attribute, and conventional research methods ignore the importance of temporal information in resilience assessments. Hence, in this study, an HSR service network model based on a temporal network framework is constructed, and an HSR service network resilience assessment method considering spatiotemporal dynamic characteristics is proposed. Considering the heterogeneity of train flow in different time periods and taking the time cost of the shortest temporal path as the network performance measure, a resilience assessment model is established based on the HSR temporal service network, and an algorithm for solving the network performance is designed. Taking China’s HSR network as a case study, the research results showed that the optimal recovery strategy exhibited a higher resilience value than four other recovery strategies. In different spatiotemporal dimensions, the impact of disturbance events on network resilience is different, and the corresponding optimal restoration sequence is also different, making the resilience of the HSR network to exhibit evident differences in the spatiotemporal distribution. In addition, an increase in the number of repair resources is not proportional to the improvement in network resilience. The railway emergency department should comprehensively consider the spatiotemporal characteristics of the disturbance distribution and reasonably determine the restoration sequence and the number of repair resources.