Abstract:

In order to improve the reliability of urban rail transit, a fault recovery strategy for urban rail transit was proposed. It was carried out based on interval restoration. The paper measured the network resilience performance function in terms of the global efficiency of the network. And the failed lines were segmented by different turnback intervals. Subsequently, an urban rail transit fault recovery model was constructed to minimize network toughness loss and total recovery time. An algorithm was designed to solve the failure recovery model, which was based on the global efficiency of the network. Finally, the fault recovery model was applied to the Chengdu metro network. Then the impact of train operation intersection adjustment on network recovery decision and network recovery performance under loop or radial line failure was discussed. The results show that the fault recovery method is effective. It can avoid the situation that the station is repaired but still needs to wait for other stations to be repaired for normal operation. The resilience loss of the recovery scheme considering train operation crossing adjustment is 28.3% less than that without considering operation crossing adjustment. Whether or not to consider train operation crossing adjustment has an important impact on the fault recovery decision for network loop lines, but has a small impact on the fault recovery decision for lines in the outer radial area.

Key words: network resilience, urban rail network, failure recovery, train routing, network global efficiency