虚拟节点有限元法解析滴灌支管水力学计算  

Finite Element Method for Hydraulic Design of Drip Irrigation Submain Units with Virtual Emitter System

作　　者：张志新[1] 王建东[2] 李鑫[3] 赵月芬 

机构地区：[1]中国农业大学现代精细农业系统综合研究重点实验室,北京100083 [2]中国水利水电科学研究院水利研究所,北京100044 [3]北京市昌平区水务局,北京102200 [4]北京地星规划设计院有限公司,北京100080

出　　处：《农业机械学报》2009年第3期99-102,共4页Transactions of the Chinese Society for Agricultural Machinery

基　　金：国家自然科学基金资助项目(50709045);国家"973"重点基础研究发展计划资助项目(2002CB111502)

摘　　要：滴灌支管和毛管组成的支管单元的水力学计算是滴灌管网水力学设计的关键环节。运用虚拟节点有限元法和虚拟节点平均水头损失有限元法解析支管单元的水力学计算,可以计算出支管和每根毛管的水头损失,同时显著减少计算量,研究结果为包含几十万乃至上百万个滴头的滴灌系统水力学设计提供了新的方法。The hydraulic calculation of drip irrigation submain units plays a key role in the system design.The finite element method with virtual emitters can compute the head loss of each submain and capillary.The ways to reduce computational errors were suggested by selecting a certain amounts of elements in order to meet drip irrigation design need.Moreover,finite element method with virtual emitters can reduce computational work and memory demands dramatically.The research method put forward in this study provides a new way for hydraulic design of large drip irrigation system.

关 键 词：滴灌 支管单元 有限元法 虚拟节点 水力学解析 

分 类 号：S275.6[农业科学—农业水土工程]