Construction And Simulation Of Cascade Failure Model Of Urban Water Supply Network

The water supply network is an important part of urban underground network,and its stability and reliability are indispensable factors to ensure the quality of people's life and the normal operation of urban function.With the rapid development of our social economy,the current urban water demand scale is becoming larger,affected by this,the number of water pipe engineering construction is increasing.Due to its sensitive characteristics to damage,the attack on the network at a certain point will have an impact on the whole network,and trigger a wide range of chain reaction and cascade failure.Based on this,the simulation verification of complex network and cascade failure of water supply network is of great significance to improve the reliability of water supply system operation,guarantee water supply safety and meet people's basic water resource needs.The main research is as follows:(1)According to the existing water supply network topology map,combined with the characteristics of the water supply network,a new definition of the node degree in the water supply network is established,and a weighted topology map of the water supply network is established,and the water supply network is provided on the Matlab R2014 b platform.Regression analysis of network degree distribution,combined with network clustering coefficient and average shortest path value,quantitative analysis of the water supply network and integrated pipe network have obvious scale-free characteristics;(2)According to the operational characteristics of the water supply network,the linear load-capacity model and the nonlinear load-capacity model in the cascade failure theory are improved by studying the complex network cascade failure theory.(3)On the Matlab R2014 b software platform,the maximum node degree of the water supply network is attacked,and the network cascade failure under various parameter values is simulated.Comparing the simulation results,the change of parameters in the model leads to the change of the connection reliability of the water supply network,and the theory that the connection reliability of the water supply network under the nonlinear load-capacity model is stronger is obtained,and the parameters are obtained by optimizing the parameters.Make the water supply network reach a plan with strong economic and connectivity reliability.In this paper,the simulation verification of complex network and cascade failure of water supply network has important theoretical and practical significance for improving the reliability of water supply system operation,ensuring water supply safety and meeting people's basic water demand.