摘要
分析了图解法、解析法和数解法等水力解析方法各自的特点,并着重比较了有限元法和Hathoot前进法等数解法的优点和局限性。根据前进法的基本思路,提出了管道式喷灌系统水力解析新方法——改进前进法(EFSM)。应用伯努力能量方程和达西-韦斯巴赫摩擦损失方程依次对干管和支管建立方程,通过逐步迭代将非线性方程线性化,并提出了针对梳齿形和干管单向布置的丰字形喷灌系统的水力解析步骤。
This paper analyzes the characteristics of graphical solution method, analytical equation method and numerical method, then discusses finite element method and forward step method of the numerical method. A new numerical method, namely extended forward step method, was presented for the hydraulic analysis of the pipeline sprinkler irrigation system. Using the Bernoulli Energy Equation and Darcy-Weisbach Equaion, the equations for laterals and submains were established respectively. By successive linear approximation, the hydraulic analysis of sprinkle irrigation system with single laterals was put forward.
出处
《农业工程学报》
EI
CAS
CSCD
北大核心
2005年第7期73-76,共4页
Transactions of the Chinese Society of Agricultural Engineering
基金
国家自然科学基金资助项目(50479008)
