混流式水轮发电机组主轴系统的模糊优化设计  

Fuzzy Optimum Design of A Main Shaft System of Francis Turbine-generator Unit

作　　者：杨旭娟[1] 李兆军[1] 蔡敢为[1] 蓝永庭[2] 

机构地区：[1]广西大学机械工程学院,南宁530004 [2]广西工学院,广西柳州545006

出　　处：《农机化研究》2009年第1期79-81,84,共4页Journal of Agricultural Mechanization Research

基　　金：国家自然科学基金项目(50565001);广西大学博士启动基金资助项目(X071043);广西“新世纪十百千人才工程”专项资金项目(2003203);教育部科学技术研究重点项目(205119);广西科学基金项目(桂科自0542005,桂科自0832030);广西制造系统与先进制造技术重点实验室主任课题项目(桂科能07109008_009_Z,桂科能07109008_003_Z)

摘　　要：以混流式水轮发电机组主轴系统为研究对象,用有限单元法建立系统的非线性全局耦合动态方程,并在此动态方程的基础上,运用模糊优化理论,建立以主轴系统动态性能为目标函数、以主轴系统的结构参数为设计变量、具有模糊约束的优化设计数学模型,给出求解此模型的方法,并通过实例对其进行仿真。仿真结果表明:所采用的模糊优化方法体现了主轴系统约束条件的模糊性,比较符合机组设计的实际情况,为进一步研究混流式水轮发电机组的多目标优化设计提供参考。A main shaft system of Francis turbine - generator unit is taken as the object of study, and the nonlinear global coupling dynamic equations of it are established by using finite element methods. By the theory of fuzzy optimum, the mathematical model with fuzzy restraints is established by means of the dynamic response of the main shaft system as Objective function, the parameters of the main shaft system as design variables. The method of solving the mathematical model is given, and an example is simulated. The simulation results show that the method of the fuzzy optimum is more suitable for optimization as the system is fuzzy. The research work has certain reference value for further multi - object optimization of the main shaft system.

关 键 词：模糊优化设计 动态特性 水轮发电机组 

分 类 号：TH113[机械工程—机械设计及理论] TK730.2[交通运输工程—轮机工程]