基于多元线性回归分析的蝶阀关闭规律函数关系研究  

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

作　　者：程洪霞[1] 吴建华[1] 

机构地区：[1]太原理工大学水利科学与工程学院,太原030024

出　　处：《山西水利科技》2010年第3期1-3,10,共4页Shanxi Hydrotechnics

基　　金：山西省青年科技研究基金项目(2007021025);山西省研究生优秀创新项目"基于调压塔防护下压力管路安全运行的计算机数值模拟研究"的资助

摘　　要：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。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 closing angle,and the function of the resistance coefficient and closing angle.Finally,this paper carried out separately relative error analysis on the two functions,and confirmed the reasonableness and the effectiveness of the two functions.The two functions,which are received in the paper,will enable the using of valve closure rule in numerical simulation of the hydraulic transition process to become more precise and convenient.

关 键 词：关闭角度 阻力系数 过流面积与阀门面积的比值 多元线性回归分析 

分 类 号：TV131[水利工程—水力学及河流动力学]