Analysis On Coupling Coordination Of Around Changsha,Zhuzhou And Xiangtan Economic And Railway Transportation

At present,most of urban agglomerations in China are of single-core.Due to short development history,the economy and traffic in urban agglomerations are weakly coordinated,and the radiation intensity of core cities can hardly meet the demand.Therefore,enhancing the coordination between economic spatial pattern and traffic spatial structure of urban agglomerations is of great significance to promote the construction of urban agglomerations in China.Therefore,Around Changsha-Zhuzhou-Xiangtan urban agglomeration is taken as the research object in this paper to study the coordination between economic spatial pattern and railway traffic structure of Changsha-Zhuzhou-Xiangtan urban agglomeration based on the spatial structure theory and complex network theory,with the main content and innovation as follows:First of all,based on the revised gravity model and the importance of urban economy,the spatial interaction ability of around Changsha-Zhuzhou-Xiangtan urban agglomeration is analyzed.As the research results show,to develop around Changsha-Zhuzhou-Xiangtan urban agglomeration into the two-core and even networked urban agglomeration,it’s required to take Zhuzhou as sub-core city and Yueyang and Hengyang as fulcrum cities to strengthen the north-south axis action of urban agglomeration,and give full play to the driving effect of Changsha as the core city.Secondly,based on the complex network,the railway passenger transport network is topologically divided into single-layer traffic network and three-layer transfer network by P space method.Through the analysis of topological indexes and robustness,it is found that the traffic network is of small-world characteristics,while the transfer network is not.Therefore,the traffic network will collapse faster than the transfer network when it is deliberately attacked,and there is also a difference in traffic importance of the cities under the two topological structures.According to the contrastive analysis of urban economy and the importance of railway traffic,it is found that other 5 cities in the urban agglomeration,except Changsha,Zhuzhou and Loudi,are all out of balance,and the economic spatial structure and railway traffic network of around Changsha-Zhuzhou-Xiangtan urban agglomeration are not coordinated.To sum up,with topological indexes as the evaluation factors,the maladjustment level of traffic network and transfer network is analyzed in this paper by principal component analysis,as well as the coupling coordination between economy and railway traffic of the urban agglomeration after the introduction of economic subsystem.In addition,economic gravity and transfer intensity of spatial interaction ability in urban agglomeration are coupled to analyze their coordination.Finally,the research results show that the urban agglomeration is mildly and moderately out of balance.According to the conclusions as drawn above,optimization suggestions on urban railways in around Changsha-Zhuzhou-Xiangtan urban agglomeration are put forward in this paper,and then optimization suggestions on intercity railways are also proposed.Secondly,the node level is reclassified based on the differences in topological importance of nodes and weak nodes in robustness under the two networks,and node optimization suggestions are raised.Finally,suggestions are put forward to optimize the railway network routes,and traffic network is taken as an example to optimize its routes.The research results of this paper can provide reference for the optimization of train operation routes in urban agglomerations,and can also be used to optimize the train number and train operation time among cities,which are of certain practical significance.Figure 36,table 14,reference 99.