Direct optimization calculation method for expanding the water supply network

expansion of the pipe network;  Optimize design;  Generalized minimalist gradient;  Standardized pipe diameter

According to the characteristics of the expanded pipe network, the optimization design objective function directly takes the pipe section diameter as the solution variable is constructed, and the generalized minimalistic gradient method (GRG) with obvious optimization effect is used to calculate by taking advantage of the hydraulic characteristics of the constraints, and the problem of solving the pipe diameter standardization is solved at one time through the objective function transformation.