基于动力特性分析的混流式水轮机组结构振动处理方案优化  

Optimization for Treatment Scheme for Structure Vibration of Francis Turbine Basic on Dynamic Characteristic Analysis

作　　者：陈国栋[1] 

机构地区：[1]福建省电力试验研究院,福建福州350007

出　　处：《福建电力与电工》2009年第1期4-8,共5页Fujian Power and Electrical Engineering

摘　　要：用结构有限元计算分析软件ANSYS进行水电机组上机架和定子机座构架系统动力特性分析,确定上机架振动过大原因:激励引起定子机座和上机架整体1阶模态共振。决定提高上机架和定子机座整体结构的1阶固有频率及整体结构刚度。为此,在动力特性分析的基础上,对结构处理方案进行分析和优化。按优化方案实施,达到预期目标。Resonance occurred in the upper bracket of high head Francis hydro-generators.The vibration source was determined from field tests and a finite element analysis of the structure.The first order natural frequency of the integrated structure including the upper bracket and the stator frame was then altered using the FEA model.The resonance during over speed operation was eliminated.

关 键 词：水电机组 动力特性 共振 有限元分析 

分 类 号：TK733.1[交通运输工程—轮机工程]