转子多重干摩擦阻尼动力吸振器及其减振特性  

Multiple frictional dynamic absorber for rotors and its vibration attenuation characteristics

作　　者：杨庚 王帅 郑昌军 毕传兴[1] YANG Geng;WANG Shuai;ZHENG Changjun;BI Chuanxing(School of Mechanical Engineering,Hefei University of Technology,Hefei 230009,China)

机构地区：[1]合肥工业大学机械工程学院,合肥230009

出　　处：《航空动力学报》2024年第7期76-85,共10页Journal of Aerospace Power

基　　金：国家自然科学基金(51805130);中央高校基本科研业务费(JZ2020HGTB0046)。

摘　　要：针对转子过临界转速时振动过大问题,提出一种具有紧凑结构的多重干摩擦阻尼吸振器,通过集成多个具有高强度的悬臂梁式振子,结合适于高温复杂环境的干摩擦阻尼,构建能够在复杂恶劣环境下工作的环形吸振器.为对吸振器进行参数设计与减振特性分析,采用有限元和拉格朗日方程方法对吸振器-转子系统进行动力学建模,并利用基于时频域转换的谐波平衡法实现对系统振动响应的高效求解.在此基础上,研究吸振器质量比、频率比、振子个数以及干摩擦界面法向正压力等参数对其减振性能的影响,分析其减振性能对于参数偏离的敏感性,结果表明:多重干摩擦阻尼吸振器能有效降低转子过1阶临界转速的振幅,减振幅度最高可达70%,且具有较好的鲁棒性.A compact vibration absorber with multiple frictional dynamic absorber was presented to dissipate the excessive vibration of rotor passing through the critical speed.The ring-like absorber integrated multiple cantilevered oscillators and the frictional damping suitable for high temperature and complex environment.In order to gain effective models for the design and performance analysis,the finite element method,combined with the Lagrange equation approach,was employed for modeling of the vibration absorber-rotor system.The harmonic balance method was applied to effectively solve the governing equation of the system.On this basis,the effects of the mass ratio,frequency ratio,the number of oscillators and the normal force on the friction surfaces on the vibration mitigation performance of the absorber were investigated.The sensitivity of its effectiveness to the random deviation of some parameters was also addressed.Numerical results showed that the presented absorber can obviously reduce the maximum response amplitude of the rotor,with the maximum relative ratio reaching above 70%.Besides,the performance of the absorber was very robust.

关 键 词：转子系统 多重动力吸振器 干摩擦阻尼 谐波平衡法 减振特性 

分 类 号：V231.92[航空宇航科学与技术—航空宇航推进理论与工程] TH113[机械工程—机械设计及理论]