【摘要】 多孔管广泛用于喷灌和微灌等节水灌溉工程。在满足多孔管允许压力差的条件下,采用变径设计,即整条多孔管由若干种标准管径的管道组成,可降低多孔管投资。该文建立了各种地形坡度条件下多孔管优化设计数学模型。在应用遗传算法求解优化设计模型中,采用符号编码方法,具有简单、易用的特点。更多还原

【Abstract】 Pipelines with multiple outlets are used extensively in water saving irrigation of sprinkler irrigation and microirrigation. The tapered diameter design was adopted, in which the whole multiple outlet pipeline consists of pipe segments with different diameters in such a way that the pipeline cost can be reduced on condition that the allowable pressure head difference is satisfied. The optimum design mathematic model of pipeline with multiple outlets was established for different slopes. The symbolic coding method is simple and easy to use in that the model is solved by using genetic algorithm.更多还原