| 固定式喷灌系统经济管径的计算方法 |
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| 引用本文： | 张庆华,杨培岭,李鹏.固定式喷灌系统经济管径的计算方法[J].水利水运工程学报,2005,0(4):19-23. |
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| 作者姓名： | 张庆华 杨培岭 李鹏 |
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| 作者单位： | 1. 山东农业大学,水利土木工程学院,山东,泰安,271018
2. 中国农业大学,水利与土木工程学院,北京,100083 |
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| 摘 要： | 在分析了固定式喷灌系统的管网投资、年运行费用与管径函数关系的基础上，利用工程经济分析中费用最小化准则和非线性规划理论，建立了求解喷灌系统管网经济管径的数学模型，并给出了无约束条件直接求解经济管径的计算式．
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| 关 键 词： | 经济管径 费用函数 费用最小化准则 固定式喷灌系统 |
| 文章编号： | 1009-640X(2005)04-0019-05 |
| 收稿时间： | 2005-07-12 |
| 修稿时间： | 2005年7月12日 |
Calculation method of economical tube diameter of fixed spray irrigation systems |
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| ZHANG Qing-hu,YANG Pei-ling,LI Peng.Calculation method of economical tube diameter of fixed spray irrigation systems[J].Hydro-Science and Engineering,2005,0(4):19-23. |
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| Authors: | ZHANG Qing-hu YANG Pei-ling LI Peng |
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| Affiliation: | 1. College of Water Conservancy and Civil Engineering, Shandong Agricultural University, Taian 271018, China; 2. College of Water Conservancy and Civil Engineering, China Agricultural University, Beifing 100083, China |
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| Abstract: | Based on the analyses of the investment of nozzle tube net and relationship between the annual operation cost and tube diameter function of a fixed spray irrigation system, a mathematic model to calculate the economical tube diameter of a spray irrigation system is developed by using the minimum expense norm and nonlinear planning theory in engineering economic analysis, and a direct calculation formula for the economical tube diameter in unrestrained conditions is presented. |
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| Keywords: | economical tube diameter expense function minimum expense norm fixed spray irrigation system |
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