摘要
本文将堰面避免空蚀的负压约束条件转化为经济目标的一部分,同时将堰上水头H的概率分布引入数学模型,从而为优化确定定型水头H_d提供了依据。本文用序列无约束最小化方法,直接探索求解优化的H_d,并分析讨论了水力条件、工程条件及约束条件等对优化H_d的影响。计算成果表明,优化H_d可使溢流坝的设计更合理、更经济。
In this paper, the constrained condition of allowable minimum pressure for cavitation-free weir crest is transformed into a part of the economic target. And the probability distribution of the heads H on crest is introduced into the optimization procedure. So, the scientific basis for determining the optimum design heads H_d is provided. By using sequential unconstrained minimization technique the optimal solutions are obtained with direct search method in the paper. The influences of hydraulic, engineering and constrained conditions on optimum are H_d analyzed. The calculated results show that optimum H_d is favorable to financial benefit of weir dams
