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本文全面考虑了环状供水管网的工作特点及工作要求,建立以管网总投资最小为目标函数,管网节点要求的供水量及供水压力为约束条件的管网管径优化计算的非线性规划数学模型。同时在约束条件中考虑了多水源供水时的水资源最优化分配问题。并根据近似规划法的优化原理将非线性规划问题转化成线性规划问题,采用单纯形法进行求解。本方法适合于环状网、树环结合管网及多水源管网的管径优化计算。
In this paper, the working characteristics and working requirements of the ring-shaped water supply network are fully considered. The nonlinear optimization of the pipe network diameter is established with the objective of minimizing the total investment of the pipe network, the water supply and the water supply pressure required by the network nodes Plan a mathematical model. At the same time, the optimal distribution of water resources in multi-water sources is considered in the constraints. According to the principle of approximate programming, the nonlinear programming problem is transformed into a linear programming problem, and the simplex method is used to solve the problem. The method is suitable for the optimization of the pipe diameter of a ring net, a tree ring and pipe network and a multi-water pipe network.