基于多元线性回归分析的蝶阀关闭规律函数关系研究

根据蝶阀关闭角每隔5°时,相对应的阻力系数和过流面积与阀门面积比的离散数值,首先,用MATLAB软件分别绘制出过流面积和阀门面积的比值关于关闭角度的离散图,以及阻力系数和关闭角度的离散图;其次,运用多元线性回归分析原理,给出了在关闭角度区间0,80]上过流面积与阀门面积的比值关于关闭角度的函数关系式,以及阻力系数和关闭角度的函数关系式;最后,分别对两个函数关系式进行了相对误差分析,证实了两个函数关系的合理性和有效性。文中得到的两个函数关系式,可以使蝶阀关闭规律在水力过渡过程数值模拟的运用中变得更为精确、易行。

The Study of the Function Relationship among the Butterfly Valve Closure Rule with Multiple Linear Regression Analysis

Based on the discrete data of resistance coefficient and the ratio of flow area and valve area,when the valve closing angle at intervals of 5 degrees,this paper,firstly,drew two discrete figures with MATLAB software.One of them is that the ratio of flow area and valve area about closing angle,the other is that the resistance coefficient about closing angle.Secondly,through the using of the multiple linear regression analysis,the paper provided the function of the ratio of flow area and valve area about clos...