【摘要】 高铁的发展压缩了区域的时空距离，改变了城市网络的空间格局，高铁流逐渐成为城市网络研究的重要视角。以“十二五”、“十四五”规划开局之年为研究节点，利用社会网络分析法，从高铁流视角探讨了长三角城市网络结构的时空演变特征。结果表明：(1)长三角基本实现高铁城市全覆盖，网络规模不断扩大，网络密度有序提升，省内和省际联系均达到了较高水平；(2)高铁网络的发展经历了发育期、青春期，走向成年期，网络集聚程度减弱且趋于稳定，呈以省会为核心的多中心、均衡化多极网络模式；(3)高铁网络城市联系稠密化趋势明显，沪宁、沪杭、宁杭线形成了稳定的三角形结构，使得更复杂的城市网络结构取代了轴线式联系形态。更多还原

【Abstract】 The growth of high-speed rail has compressed the region’s spatio-temporal distances significantly, and altered the spatial pattern of urban network. High-speed rail flow has grown to be a significant perspective for urban network studies. Taking the first year of the 12th, 14th Five-Year Plans as the research node, we used social network analysis method to study the spatio-temporal evolution features of urban network structure in the Yangtze River Delta region from the perspective of high-speed rail flow. The results indicate that(1)the Yangtze River Delta has essentially attained full coverage of high-speed rail cities, the network scale has been steadily increased, the network density has been improved in a systematic manner, and the intra-provincial and inter-provincial links have attained a high level.(2) The high-speed rail network has gone through three stages of development, such as childhood, adolescence, and adulthood, indicating a multi-center and balanced multi-polar network model with the province capital as its core. The degree of network agglomeration has weakened and tended to remain steady.(3)In the Yangtze River Delta, there is a clear tendency toward dense urban connectivity in the high-speed rail network. Three stable triangles have been established by the Shanghai-Nanjing, Shanghai-Hangzhou, and Nanjing-Hangzhou intercity rail. The axial connection form has been replaced with the more intricate network structure.更多还原