Resilience Optimization of Urban Agglomeration Passenger Transport Network Considering Travel Impedance
In order to enhance the resilience of urban agglomeration passenger transport network in the event of rainstorm,flood and other emergencies,a method of improving the resilience of urban agglomera-tion passenger transport network based on passenger travel impedance was proposed and verified.Firstly,the characteristics of the composite transportation network structure were analyzed in depth,and the urban agglomeration passenger transport network model reflecting the transfer relationship between different modes of transportation was constructed.Secondly,combined with passenger travel cost and time,the comprehensive impedance was used to quantify the weight of the network edge,and the network im-pedance efficiency was used as the measurement index of resilience.Finally,taking Hohhot-Baotou-Ordos-Ulanqab urban agglomeration as an example,the simulation study was carried out to simulate the improvement effect of four kinds of edge-adding strategies,such as random edge-adding,node de-gree edge-adding,node betweenness edge-adding and clustering coefficient edge-adding,on resilience under different attack scenarios.The experimental results show that deliberate attacks make the net-work performance decrease rapidly,and the number of paralyzed sites increases by 20%compared with random attacks.Under different attack modes,compared with the original network,all four edge-adding strategies mentioned above can effectively reduce the passenger travel cost and the proportion of network paralysis,and the travel cost can be reduced by up to 27.9%.The four edge-adding strate-gies increase the network resilience by 10%,22%,7%and 14%,respectively.The results show that different edge-adding strategies have different degrees of impact on the resilience of urban agglomera-tion passenger transport network,and the node degree edge-adding strategy has the greatest effect on the improvement of network resilience.
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