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在考虑了机压管道式喷灌系统配水干管管网流量变化的基础上 ,针对该管网控制点压力约束所具有的模糊性 ,建立了管网优化计算的模糊线性规划模型 ,在模型的求解过程中 ,通过适当的变换 ,将模糊线性规划问题转换成普通的线性规划问题。应用上述模型 ,可进行机压管道式喷灌系统配水干管管网的优化计算 ,可确定水泵最优扬程及干管各管段尺寸最优值 ,以使干管管网系统年费用值达最小。与普通线性规划模型相比 ,所提出的方法可使设计结果更加经济合理。
Considering the variation of the flow of the water main pipe network in the pipe-pressure sprinkler system, aiming at the fuzziness of the pressure restriction of the pipe network control point, a fuzzy linear programming model of pipe network optimization calculation is established. During the process, the fuzzy linear programming problem can be transformed into a common linear programming problem through proper transformation. The above model can be used to optimize the water distribution pipe network of the pipe-pressure sprinkler irrigation system, which can determine the optimal lift and the optimum pipe size of each pipe, so as to minimize the annual cost of the pipe system. Compared with the ordinary linear programming model, the proposed method can make the design more economical and reasonable.