摘要
提出研究一种适用于旋转机械频率可在线连续调节的笼式调谐质量阻尼器(Tuned Mass Damper,TMD),通过在线改变其悬臂杆有效长度可连续改变TMD的刚度,从而实现TMD频率的调节。该笼式TMD具有结构紧凑、刚度调整范围大等优点。建立转子-TMD的有限元模型,设计基于转速的分段控制策略实现对该TMD的频率调节控制,仿真对比分析TMD在频率可控及不可控情况下对柔性转子过临界及在工作转速下的不平衡振动抑制效果,并设计相应的实验平台进行验证分析。仿真及实验结果均表明:基于转速的分段控制策略能实现在线控制TMD频率调节,有效控制柔性转子过临界及工作转速的不平衡振动,相对于被动型频率不可调TMD更具有优势,其减振效果明显,降幅高达90.8%。
An innovative design for an on-line cage-type tuned mass damper（TMD）whose frequency is continuously adjustable and which is suitable for rotating machinery is proposed.The stiffness of the TMD can be changed online continuously by changing its effective length of cantilever rod,so as to realize continuous frequency modulation of the TMD.The cage-type TMD has advantages of compact structure,large range of adjustable stiffness and so on.The finite element model of the rotor-TMD was built,and the sectional control strategy based on velocity was designed for adjusting the cage-type TMD frequency.The numerical simulation comparative analysis of the TMD on the case of its frequencies adjustable and non-adjustable controlling the flexible rotor unbalance vibration when going through critical speed and at the working speed was conducted.And the corresponding experimental platform was designed for validation.The simulation and experimental results show that sectional control strategy based on velocity can yield online timely control the frequency modulation of TMD,and control the flexible rotor unbalanced vibration when going through critical speed and at the working speed effectively,that has more advantages compared with the passive TMD.The vibration reduction is very effective,which is as far as up to 90.8%.
出处
《振动工程学报》
EI
CSCD
北大核心
2015年第5期778-784,共7页
Journal of Vibration Engineering
基金
国家重点基础研究发展计划(973计划)(2012CB026000)
北京市博士点基金资助项目(20110010110009)
关键词
转子动力学
笼式调谐质量阻尼器
分段控制
减振
dynamics of rotor
cage-type tuned mass damper
subsection control
vibration reduction
