【摘要】 根据年运行费用最小的原理,建立了UPVC管经济管径计算的数学模型.依据宁夏水利建筑工程预算定额得出UPVC管预算价,结合宁夏农村饮水安全工程的特点,利用Excel中的规划求解功能对数学模型进行计算,得出不同管径、不同承压的UPVC管相应的经济流速.通过对计算结果分析得出了影响UPVC管经济流速的主要因素及不同规格UPVC管的经济流速范围,提出了宁夏农村饮水安全工程UPVC管经济流速确定中应考虑的一些问题.更多还原

【Abstract】 According to the principle of minimum year operating cost, the mathematical model of economic pipe diameter calculation of the UPVC pipe was established. UPVC pipe budget price was estimated on the basis of Ningxia water conservancy construction engineering budget ration. Combined with the characteristics of Ningxia rural drinking water safety engineering, corresponding economic velocity were obtained for different diameter and different pressure of UPVC pipe by using the planning function of Excel calculation mathematical model. The main factors of influencing the UPVC pipe economic flow rate and economic velocity range for different specifications of UPVC pipe were obtained by calculation results analysis. Some should be considered problems in determination of UPVC pipe economic velocity were brought forward in Ningxia rural drinking water safety project.更多还原