基于组合权重的模糊物元模型在输水管材选型中的应用

在输调水工程中,管材选型问题具有模糊不相容和多目标性的特点,是工程技术人员面临的技术难题。建立了一种基于变异系数和层次分析法的模糊物元评价方法,分析了影响管材选择的各种指标,构建了管材类型选择的综合评价指标体系;引入了变异系数法修正层次分析法确定指标权重时的主观性,从而确定了评价指标的组合权重,建立了模糊物元评价模型,并利用欧式贴近度结合价值工程原理判断最优管型。在研究过程中,以新疆某引水管线工程的管材选型为例进行评价模型的工程应用,经计算可得最适宜该工程的管材类型为玻璃纤维增强塑料夹砂管(FRPM)。结果表明,利用本模型进行管材选型,可以根据实地工程条件以及管材技术特性,考虑技术、经济、施工、安全等多方面影响因素,选择出适宜本工程条件的最优管型。

Application of Fuzzy Matter-Element Model Based on Combined Weight in Selection of Water Delivery Pipe

In water transmission and transfer project,the selection of pipe is a technical difficulty for technical personnel as it is of fuzzy incompatibility and multi-objective.In this paper,a fuzzy matter-element evaluation method based on variation coefficient and analytic hierarchy process(AHP)is established.Indexes affecting the selection of pipe materials are analyzed,and a comprehensive evaluation index system for the selection of pipe materials is constructed.Variation coefficient is introduced to modify the subjectivity of AHP in determining the index weights.In such manner,the combination weight of the evaluation indexes are determined,and a fuzzy matter-element evaluation model is established.Furthermore,the optimal pipe type can be determined by using the Euclid's nearness degree together with the principle of value engineering.The model is applied to the pipe selection of a water diversion project in Xinjiang.Calculation result reveals that Fiber-Glass-Reinforced Plastic Matrix Pipe(FRPM)is the most suitable pipe type for the project.The results demonstrate that the optimal pipe type can be determined using the present method according to field engineering conditions and technical characteristics of pipes in consideration of technical,economic,construction,safety and other factors.