摘要
提出了一种基于有限元法和动态规划法的微灌系统管网优化设计方法,该方法先利用有限元法,设计出符合灌水器平均流量和灌水均匀度要求的支管与毛管参数组合方案,及相应的支管单元操作压力水头,然后将这些参数组合与支管单元操作压力水头代入动态规划模型,即可设计出微灌系统各级管道管径的最优组合方案,并确定微灌系统所需的操作压力水头。同时给出了一个微灌系统管网优化设计算例,结果表明该方法具有计算简单、方便等优点。
On the basis of the finite element method and the dynamic partitioning method, an optimal design method of the pipe network of micro-irrigation systems was brought forward. At first, the method used the finite element method to design the combination plan of submains and hollow forgings capable of meeting with the requirement of the douches in a micro-irrigation system that the water flux and water-discharging uniformity of the douches be equilibrated, and the pressure heads of the correspondent submain units; next, the parameters of the design and the pressure heads were input into the dynamic programming model and then the optimal combination design of the diameters of various orders of micro-irrigation pipes in the system as well as the pressure heads necessary to operate the system was obtained. Meanwhile, a case adopting the optimal design method was presented and proved that the method was simple and convenient in operation.
出处
《干旱地区农业研究》
CSCD
北大核心
2005年第1期28-33,共6页
Agricultural Research in the Arid Areas
基金
国家自然科学基金(40071020)
