基于轴辐式网络的高铁快运通达性研究OA

In recent years,the demand of China's logistics market has been growing,and high speed rail express has gradually become an important transportation carrier in China's logistics system with its competitive advantages of strong timeliness,high safety,and good accessibility.To further enhance the transportation efficiency of high speed rail express,a multi-dimensional index quantification system was constructed to study the hierarchical hub-and-spoke network and the accessibility of nodes of China's high speed rail express and optimize the layout of the high speed rail express network.Firstly,the node hierarchy was preliminarily determined by systematic cluster analysis and then was optimized based on K-means cluster analysis considering the influence of the geographical position of node handling stations,thus forming a hierarchical hub-and-spoke network planning scheme for high speed rail express in China.Based on the train operation timetable of high speed railways,a calculation method for the accessibility of high speed rail express was proposed.Finally,taking 146 handling stations in China as examples,a concrete analysis was conducted,and optimization suggestions were put forward,which provided theoretical support for the formulation and scheduling adjustment of the high speed rail express transportation scheme.