基于可达性的西安古城区公交线网分层优化研究

发布时间：2018-06-19 04:02

本文选题：西安古城区 + 可达性　；参考：《西安建筑科技大学》2015年硕士论文

【摘要】：西安古城区作为古长安城区,现代化西安的核心区域,集中体现了西安的城市特色和古都风貌。古城区的发展离不开城市交通的合理规划,而建立合理完善的古城区公共交通系统是协调古城区保护与发展间关系,促进古城区可持续健康发展的重要举措之一。西安古城区是指城市中心区内明城墙所围合的区域。本文以西安古城区常规公交为例,分析了古城区由于城市化进程的不断加快和城市功能的过度集中造成的公共交通问题,提出对古城区公交线网进行分层优化的必要性。收集西安市208条公交线路1406个公交站点信息,利用matlab建立西安市公交复杂网络模型,从公交站点网络模型和公交换乘网络模型两方面利用Floyd算法求解任意两站点的最短拓扑距离,并计算每个站点的最短路径指数。选择可达性作为公交站点等级划分的依据,将复杂网络中介数的概念引入可达性度量方法,利用Ucinet软件计算公交站点网络模型和公交换乘网络模型下的介数指标,建立改进的可达性拓扑度量模型。并利用改进后的可达性拓扑度量模型计算西安市公交站点的可达性指标AI,以北院门、三学街、七贤庄三个历史街区为例,研究古城区公交站点的可达性。使用SPSS软件对古城区站点的可达性指标AI进行分析,将古城区公交站点依据可达性分为三类,并结合古城公交线路现状对西安古城区公交线网进行分层,并分析每层公交线网的特征。根据特征针对不同层次的公交线网制定不同的优化目标,建立不同的优化模型,利用蚁群算法,通过VC编程求解最优线路集合,结合现状古城区公交线网进行调整,得到优化调整后的古城公交主干线、古城公交次干线和古城公交支线。最后将换乘次数作为公共交通网络的评价指标,对比优化调整前后的公交线网,证明经过优化调整,公交线网平均换乘次数下降,公交线网的运营效率和公交系统的服务水平得到提升。本研究得到《中西部历史名城历史街区空间保护与再造的交通运输规划设计理论与方法研究》国家自然科学基金(NO.51278396)的资助。
[Abstract]:As an ancient Changan city, the core area of modern Xi'an embodies the city characteristics and ancient capital features of Xi'an. The development of ancient urban areas can not be separated from the rational planning of urban traffic, and the establishment of a reasonable and perfect public transport system in ancient urban areas is one of the important measures to coordinate the relationship between the protection and development of ancient urban areas and to promote the sustainable and healthy development of ancient urban areas. Xi'an ancient urban area refers to the area surrounded by Ming city walls in the central district of Xi'an. Taking the routine public transport in the ancient urban area of Xi'an as an example, this paper analyzes the public transportation problems caused by the accelerating urbanization process and the excessive concentration of the urban functions, and puts forward the necessity of the hierarchical optimization of the public transport network in the ancient urban area. Collect the information of 1406 bus stations on 208 bus lines in Xi'an, and use matlab to establish the complex network model of Xi'an public transportation. The shortest topological distance of any two stations is solved by Floyd algorithm from two aspects: bus station network model and bus transfer network model, and the shortest path index of each station is calculated. This paper selects reachability as the basis of bus station classification, introduces the concept of complex network intermediary number into the reachability measurement method, and calculates the intermediate index of bus station network model and bus transfer network model by using Ucinet software. An improved reachability topological metric model is established. Using the improved reachability topology model to calculate the reachability index of Xi'an bus station, such as the north courtyard gate, Sanxue street and Qixian Zhuang, as an example, the paper studies the reachability of the public transportation station in ancient urban area. By using SPSS software to analyze the accessibility index AI of the ancient urban area stations, the public transport stations in ancient urban areas are divided into three categories according to accessibility, and combined with the current situation of the ancient city bus lines, the traffic network of Xi'an ancient urban area is stratified. And analyze the characteristics of each layer of bus network. According to the characteristics of different levels of public transport network to formulate different optimization objectives, to establish different optimization models, using ant colony algorithm, through VC programming to solve the optimal line set, combined with the current situation of urban transit network adjustment. Get the optimized adjustment of the old city bus main line, the ancient city public transport sub-trunk line and the ancient city bus branch line. Finally, taking the transfer times as the evaluation index of the public transport network, comparing the bus network before and after the optimization adjustment, it is proved that the average number of transfer times of the public transport network decreases after the optimization adjustment. The operation efficiency of bus network and the service level of public transportation system have been improved. The research is supported by the National Natural Science Foundation of China (No. 51278396).
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：U491.17

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