基于管网性能评价的管网更新优化模型研究

发布时间：2018-06-01 22:38

本文选题：供水管网 + 更新改造　；参考：《天津大学》2014年硕士论文

【摘要】：管网的更新优化改造设计是一项复杂而庞大的工程,因此,科学合理的对管网现状进行综合性能评价,对于待更新改造管段进行选择与排序,并在此基础上建立供水管网的更新改造优化模型具有重要意义。本文采用专家评分法、模糊层次分析法、最优化理论及粒子群算法等,对管网性能评价指标进行了筛选、提出了评价指标体系;在此基础上研究建立了管网更新改造优化模型,确定了模型的解法,并通过实例进行验证,效果良好。本文主要结论如下:首先,确定一套以水力可靠性、水质安全性、结构稳定性和经济性为基础的供水管网综合性能评价体系,并采用模糊层次分析法确定了各项指标的权重。其中水力可靠性分别从管网各节点的自由度、水量和水压三个方面进行评价;水质安全性主要从余氯和水龄两方面对管网的水质情况进行评价;结构稳定性从各管段的管材、管龄、衬层情况和荷载情况进行评价;对管网的经济性评价,采用价值工程法计算管网单位供水量的成本进行评价。其次,基于管网综合性能评价体系,确立管段综合性能评价方法,并依据该方法对待优化管段进行选择与排序。利用EPANET建立的管网水力模型,对管网中各管段的性能进行评价与排序。在管网更新改造费用一定的条件下,对管网更新改造管段进行选择。再次,建立了一套以管网综合性能最优为目标的供水管网更新改造优化模型。该模型在管网更新改造费用一定的条件下,对已选管段进行优化改造设计,确定更新改造管段的管径组合,实现管网综合性能的最优。为了实现管网综合性能最优,通过使用粒子群算法(Particle Swarm Optimization,PSO)来实现。并且使用MATLAB编写的EPANET-toolbox,将管网计算和优化算法进行有机结合。最后,以华北地区某城市开发区管网做为研究对象,对管网现状进行综合性能评价,选择并确定了更新改造优化管段集合,运用供水管网更新改造优化模型进行计算求解。
[Abstract]:The renewal and optimization design of the pipeline network is a complex and huge project. Therefore, the comprehensive performance evaluation of the current situation of the pipeline network is carried out scientifically and reasonably, and the pipeline section to be renovated is selected and sorted. On the basis of this, it is of great significance to establish the optimal model of water supply network renewal and transformation. In this paper, the expert scoring method, fuzzy analytic hierarchy process, optimization theory and particle swarm optimization algorithm are used to screen the evaluation index of pipe network performance, and the evaluation index system is put forward. The solution of the model is determined and verified by an example, and the result is good. The main conclusions of this paper are as follows: firstly, a comprehensive performance evaluation system of water supply network based on hydraulic reliability, water quality safety, structural stability and economy is established, and the weight of each index is determined by fuzzy analytic hierarchy process (FAHP). The hydraulic reliability is evaluated from three aspects: the degree of freedom of each node of the pipe network, the quantity of water and the water pressure; the safety of water quality is mainly evaluated from the two aspects of residual chlorine and water age; the structural stability is from the pipe material of each section of the pipe, The value engineering method is used to evaluate the cost of water supply per unit of pipe network. Secondly, based on the comprehensive performance evaluation system of pipe network, the comprehensive performance evaluation method of pipe segment is established, and the optimal pipe segment is selected and sorted according to this method. Based on the hydraulic model of pipe network established by EPANET, the performance of each section of pipe network is evaluated and sorted. Under the condition of the fixed cost of the network renewal and transformation, the pipe section of the network renewal and transformation is selected. Thirdly, an optimization model of water supply network renewal and transformation is established, which aims at the optimal comprehensive performance of water supply network. Under the condition of the fixed cost of the renewal and transformation of the pipeline network, the model optimizes the design of the selected pipe segment, determines the pipe diameter combination of the renewal section, and realizes the optimal comprehensive performance of the pipe network. In order to achieve the optimal comprehensive performance of the pipe network, particle swarm optimization algorithm (PSO) is used. Using EPANET-toolbox written by MATLAB, the pipe network calculation and optimization algorithm are combined organically. Finally, taking the pipeline network of a city development zone in North China as the research object, the comprehensive performance evaluation of the present situation of the pipeline network is carried out, and the optimal section set of the renewal and transformation is selected and determined, and the optimization model of the renewal and transformation of the water supply network is used to calculate and solve the problem.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TU991.33

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