Study On The Invulnerability Of Urban Bus Transit Network

The urban bus system,one of the important components of the public transportation system,is the infrastructure for urban development,and at the same time becomes the link connecting the city’s economic,technological and cultural activities,and occupies an important position in social development,but the urban bus network is often subject to random or deliberate The attack resulted in a decline in the invulnerability of the network,seriously affected the accessibility and punctuality of the network operation,increased the travel distance of passengers,disrupted the normal operation of the entire transportation network,and caused a bad social impact.The city bus network contains a large number of bus stations and a complicated line network,which is a very typical and complicated network.The in-depth study of complex network theory and applications provides new ideas and new methods for analyzing the invulnerability of urban bus networks.It has important roles in ensuring passenger travel,optimizing the structure and function of urban bus networks,and improving the quality of transportation services and operational safety of urban bus systems.Extremely important meaning.The main contents of this dissertation are as follows: First of all,on the basis of analyzing the invulnerability of the complex network,the indestructibility of the urban bus network is defined,and at the same time,the main factors affecting the insecurity of the urban bus network are analyzed.Then based on the Space L method,the distance between the stations,the reliability of the travel time of the road segment and the reliability of the connection of the road segment are considered,and they are used as the weights of the middle of the network to construct the urban bus network model respectively,and the corresponding indestructibility measurement indicators are proposed to establish the static The attack strategy,dynamic attack strategy and individual attack strategy delete the network nodes and the invulnerability simulation model that adopts the individual attack strategy to the edge.Finally,taking the real city bus network as an example,with the aid of the software Matlab,the process of attacking the city bus network by different attack strategies is simulated,and the invulnerability of the bus network under different attack strategies is analyzed in detail.The analysis and research on the invulnerability of urban public transit networks based on complex network theory is of great significance in realizing the better planning and transformation of urban public transit networks,enhancing the network invulnerability,the quality of transport services and operational safety of urban public transit systems,and Provide different ideas and directions for the research on the invulnerability of urban bus networks.