【摘要】 结合工程实际,对管材的特性进行了比选,利用年运行费用最小的原则,建立了经济管径计算的数学模型,根据工程的具体条件,计算得出了相应的经济管径,并对影响经济管径的主要因素进行了分析,为合理确定经济管径提供了理论依据。更多还原

【Abstract】 Combining with practical engineering,the characteristics of the pipe were comparison,a mathematical model to calculate the economic use of the smallest diameter of the principle of annual operating costs,according to the specific conditions of the project,calculated the corresponding economic diameter,the impact of the economic the diameter of the main factors were analyzed,to determine the reasonable economic diameter provides a theoretical basis.更多还原