非线性能量阱在转子系统振动抑制中的应用  

Application of Nonlinear Energy Sink for Rotor System Vibration Suppression

作　　者：姚红良[1] 曹焱博 张钦 闻邦椿[1] YAO Hongliang;CAO Yanbo;ZHANG Qin;WEN Bangchun(School of Mechanical Engineering and Automation,Northeastern University,Shenyang 110819)

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819

出　　处：《机械工程学报》2020年第15期191-197,共7页Journal of Mechanical Engineering

基　　金：国家自然科学基金(U1708257);中央高校基本科研基金(N180313009)资助项目。

摘　　要：现代旋转机械需要结构简单且具有宽频抑振范围的抑振装置,因此研发了一种具有分段线性非线性刚度的非线性能量阱(Nonlinearenergysink,NES)。首先介绍了该非线性能量阱的结构和工作原理;其次分析了非线性能量阱的刚度和阻尼特性,并建立了转子-非线性能量阱系统的动力学方程;之后,采用数值方法分析了非线性能量阱在各向同性转子系统和各向异性转子系统中的振动抑制效果,并对其宽频抑振能力进行了验证;最后,建立试验系统验证了非线性能量阱的效果。研究结果表明,该非线性能量阱对于各向同性和各向异性转子系统都有很好的振动抑制能力,数值仿真最佳抑振率达到68%,试验最佳抑振率达到67%。To satisfy the requirement for vibration suppression device with simple structure and wide effective vibration suppression frequency range, a nonlinear energy sink(NES) with piecewise linear stiffness for rotating machinery is presented. Firstly, the structure and vibration suppression mechanism of the NES is proposed. Then, the stiffness and damping characteristics of the NES are analyzed and the dynamic model of the rotor system with the NES is built. The dynamics of the isotropic and anisotropic rotor system with the NES is numerically studied and the wide band frequency vibration suppression effectiveness is analyzed. The results show that the NES is effective both for the isotropic rotor system and the anisotropic rotor system. The vibration suppression can reach 68% in simulation and 67% in experiment.

关 键 词：转子系统 非线性能量阱 振动抑制 分段线性刚度 

分 类 号：TH113[机械工程—机械设计及理论]