基于MRD的水轮发电机组轴系非线性振动控制  

Nonlinear vibration control for hydro-generator unit’s shafting based on MRD

作　　者：孙万泉[1,2] 张宁 SUN Wanquan;ZHANG Ning(School of Renewable Energy,North China Electric Power University,Beijing 102206,China;Beijing Municipal Key Lab of Energy Safety and Clean Utilization,Beijing 102206,China)

机构地区：[1]华北电力大学可再生能源学院,北京102206 [2]能源的安全与清洁利用北京市重点实验室,北京102206

出　　处：《振动与冲击》2020年第1期79-84,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51579100)

摘　　要：考虑多种非线性因素作用下,将磁流变液阻尼器(MRD)引入水轮发电机组非线性振动模型中,建立了基于磁流变液的机组非线性动力模型,研究磁流变液对水轮发电机组轴系振动的影响。通过与传统机组非线性模型进行对比研究,结果表明,使用MRD阻尼被动控制,能够明显改善水轮发电机组系统的动力响应。MRD可以在机组系统周期运动时减小其振幅和速度响应,而不改变其运动形式;并能够抑制某些过渡工况下转速升高后出现的复杂拟周期运动,并减小其振幅波动。Considering actions of various nonlinear factors,a magnetorheological fluid damper(MRD)was introduced into nonlinear vibration model of a hydro-generator unit.The nonlinear dynamic model of the hydro-generator unit shafting based on MRD was established,and effects of MRD on its vibration were studied.Through contrastively study the new model and the traditional nonlinear model for hydro-generator unit,the results showed that using MRD damping passive control can significantly improve dynamic responses of the unit system,and reduce vibration displacement amplitudes and velocity responses of the unit system during its periodic motion without changing its motion form;it can also suppress complex quasi-periodic motion appearing after rotating speed rises under some transient conditions,and reduce its amplitude fluctuation.

关 键 词：水轮发电机组 磁流变液阻尼器 振动控制 非线性振动 

分 类 号：TV734.1[水利工程—水利水电工程]