一种污水管网系统优化的新方法

本文从大系统的角度,把污水管网系统的布局和管道参数的优化问题,看作为污水管网系统中的两个互相关联的子系统。在优化过程中,首先,用SI算法求出系统Steiner的最短树,作为其初始布局;其次,假定管径为连续变量,用高斯—赛德尔迭代法求出管道的优化参数,同时,对系统的初始布局进一步协调;最后,用点列枚举法求出管道实际参数的优化值。实例的计算表明,该方法相对简单,且有较好的经济效益。

A New Method for Optimising Pipe Network of Sewerage Systems

In the paper optimization problems of both the layout and pipe design parameters for sewerage systems are seen to be two subsystems which are interacted on each other in sewerage systems from the point of view of large scale system. In the procedure of optimization, first, Steiner minimal tree is found using SI algorithm, which is used as the initial layout of the systems; second, supposing the diameters of links are continuous varirbles, optimal design parameters for all links are found by means of Gauss-Siedel iteration method; finally, the actual optimal design parameters for all links are obtained by means of enumeration for each of the available pipe diameter sizes. The results of compu-tation for an actual example show that the method presented here is relatively simple, and that it can obtain relatively good economic profit.