本文讨论了城市给水管网设计中管段流量分配对经济管径的影响,采用非线性优化中普遍认为是行之有效的广义简约梯度法(GRG)构造了一个无需假定流量分配的管径优化设计算法。本文算例表明这一算法具有良好的收敛性,并且在管径优化的同时,作为从属状态的管段流量也达到了最佳的分配形式。该算法通过求解线性规划模型最终绘出标准规格的管径。 This paper discusses the influence of pipe flow distribution on the economic diameter in the design of urban water distribution networks, and uses a generalized reduced gradient method (GRG) that is generally considered to be effective in nonlinear optimization to construct a pipe diameter optimization design without assuming flow distribution. algorithm. The example shows that this algorithm has good convergence, and at the same time when the pipe diameter is optimized, the flow of the pipe segment as a subordinate state also reaches the best distribution form. The algorithm finally draws the pipe diameter of the standard specification by solving the linear programming model.