摘要
建立了冲击减振器与非线性能量阱耦合系统的新型吸振模型,数值模拟的结果验证了该吸振装置的高效性.分析了其参数对主结构振幅、能量耗散以及振动频率的影响,即使系统的初始输入能量变化范围较大,耦合装置也能取得很好的吸振效果.进一步的研究结果表明适当的间隙和较高的碰撞恢复系数既可以增加系统的碰撞运动次数,又能使系统在每次碰撞过程中耗散更多的能量,且该系统中的强非线性刚度有利于吸振.
A new absorber combining an impact damper coupled with nonlinear energy sink(NES)was proposed,and its vibration attenuation efficiency was investigated by numerical simulations.The influences of absorber parameters on the amplitude of main structure,energy dissipating and vibration frequency were analyzed.It was demonstrated that this coupled system possesses high absorbing performance even in a wide range of initial input energy,and an appropriate clearance or a large restitution coefficient ca increases the number of collision and dissipate more energy at each collision.Moreover,strong nonlinear stiffness is in favor of enhancing vibration absorption.
作者
李继伟
赵泽福
Li Jiwei;Zhao Zefu(Research Institute,CRRC Yongji Electric Co.Ltd,Xi′an 710055,China;School of Mechatronic Engineering,Lanzhou Jiaotong University,Lanzhou 730070,China)
出处
《动力学与控制学报》
2020年第2期76-81,共6页
Journal of Dynamics and Control
关键词
冲击减振器
非线性能量阱
吸振
能量耗散
impact damper
nonlinear energy sink
vibration absorption
energy dissipation
