Akademik Veri Yönetim Sistemi
16th International Conference on Management Science and Engineering Management (ICMSEM), Ankara, Türkiye, 3 - 06 Ağustos 2022, ss.43-56
Emergencies may cause damage to transportation infrastructure system, and lead to demand surge at the same time. When some links or nodes in the transportation system are attacked by emergencies, failures will occur. Road users will avoid the failed links and merge into the adjacent links, resulting in the flow of the adjacent links are more than their capacities and then failure occurs. The dynamic propagation of failure will lead to cascading failure of transportation network. In this paper, a capacity-load model is used to simulate and analyze the cascading failure process of transportation system. The process of simulation considers the occurrence of failure from nodes and from links respectively. In order to better simulate the actual situation, the model also takes into account the surge of demand. When an emergency occurs at a node, the node and its connected links fail, and the demand for the node's travel flow surges. When an emergency occurs on the road link, the link fails, and the demand from the two connected nodes surges. Through simulation, it can be found that the cascading failure propagates faster and the failure degree is greater, when the node is attacked than when the link is attacked.