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分析该系统在电磁力、自激惯性力共同作用下的组合共振特性,揭示了组合共振特性与系统的水力参数、电磁参数和结构参数的关系。最后通过一实例进行了仿真分析,得到了系统的组合共振特性。
Under the combined action of high head,high flow rate fluid and strong electromagnetic field,the vibra- tion of Francis turbine-generator units is quite mysterious.Taking the main shaft system of a hydraulic turbine-generator u- nit as object,the nonlinear global coupling dynamic equations were established by using finite element method.Based on the equations,by numerical simulation combination resonance of the system was analyzed under both electromagnetic force and self-excited inertial force.The effects of fluid,structural and electromagnetic parameters on the combination resonance characteristics of main shaft system were investigated.
出处
《振动与冲击》
EI
CSCD
北大核心
2008年第11期87-90,96,共5页
Journal of Vibration and Shock
基金
国家自然科学基金资助项目(50565001)
广西大学博士启动基金资助项目(X071043)
关键词
水轮机
主轴系统
全局耦合
组合共振
turbine
main shaft system
global coupling
combination resonance
