试论水轮机允许吸出高度中的安全系数

Discussion on the Safety Coefficient of Permissible Draw Heights of Turbines

水轮机允许吸出高度中安全系数的选用,对机组稳定运行和厂房基础开挖影响较大,是一个复杂的技术经济问题,不能单纯为避免汽蚀而盲目加大安全系数。用经济安全系数的概念,并用模糊数学方法将影响安全系数的众多的定性因素定量化,从而最终选定经济安全系数。通过实例分析对比,证明此法是可行的。

The safety coefficient of permissble draw height greatly affects the volume of excavation for the foundation of the station, it is a very complex technic economic problem, therefore the safety coefficient cann't be increased only for avoiding air erosion. According to the concept of economic safety coefficient, many qualitative factors influencing the safety coefficient are quantified based upon the Dim Mathematical method. Through eamparative analysis of living examples, this method is proven to be feasible.