城市空间扩张下城乡道路网通达性演化仿真  

Evolution Simulation of Urban and Rural Road Network Accessibility under Urban Spatial

作　　者：邢吉平 赵瑜隆 XING Ji-ping;ZHAO Yu-long(School of Transportation,Southeast University,Nanjing Jiangsu 211189,China)

机构地区：[1]东南大学交通学院,江苏南京211189

出　　处：《计算机仿真》2023年第3期192-196,376,共6页Computer Simulation

摘　　要：道路通达性研究有利于提升交通网络基础设施建设,为今后道路建设打下基础,因此仿真分析城市空间扩张下城乡道路网通达性演化。利用最小成本搜寻法构建最短时间通达性模型,在此基础上获得城市空间格局划分的重要参数;使用关联维数和分支维数确定城乡道路网络复杂性参数;综合这些参数与城市空间格局各个乡镇与城市节点的总运输距离和总运输距离平均值之间的比值计算城乡道路网通达性系数,由此衡量城乡道路网络整体通达性演化。经过仿真证明,研究区域近年城市扩张迅速,上述方法能够合理划分出城市空间格局,城乡道路交通网络由轴辐扩散形状通达性演化为环状道路网络通达性特点,呈现良好通达性演化效果。The study of road accessibility is conducive to the improvement of transportation network infrastructure construction and lays a foundation for road construction in the future.Therefore,the evolution of urban and rural road network accessibility under urban space expansion was simulated and analyzed in the paper.The minimum time accessibility model was constructed by using the minimum cost search method,and the important parameters of urban spatial pattern division were obtained.Correlation dimension and branch dimension were used to determine the complexity parameters of urban and rural road network.The accessibility coefficient of urban and rural road network was calculated by combining these parameters with the ratio between the total transport distance and the average of the total transport distance of each township and city node in the urban spatial pattern,so as to measure the overall accessibility evolution of urban and rural road network.The simulation results show that the urban expansion in the study area is rapid in recent years,and the proposed method can reasonably divide the urban spatial pattern;The urban and rural road traffic network has evolved from the shape accessibility of axial and radial diffusion to the ring road network accessibility,showing a good accessibility evolution effect.

关 键 词：城市空间 扩张下 城乡道路网 通达性 演化仿真 格局划分 

分 类 号：TU984[建筑科学—城市规划与设计]