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为了计算管道灌溉系统的经济管径 ,通过分析管道灌溉系统的费用函数 ,根据工程经济分析中的费用最小化准则 ,建立了求解经济管径的数学模型 ,并阐述了模型的求解方法 ,最终导出了在无约束条件下的求解管道灌溉系统经济管径的公式
In order to calculate the economic pipe diameter of pipeline irrigation system, a mathematical model to solve the economic pipe diameter is established according to the cost function of pipeline irrigation system and the cost minimization criterion in engineering economic analysis. Finally, the solution method of the model is expounded The formula for calculating the economic pipe diameter of the pipe irrigation system under the condition of no constraint is obtained