摘要
针对传统的线性隔振系统,提出一种由永磁铁与拉伸弹簧组合而成的新型准零刚度隔振系统,设计用于光栅刻划机等精密设备的低频或超低频隔振。首先,建立系统的静力学模型,求出该系统满足准零刚度所需条件,分析各结构参数对隔振性能的影响;其次,通过对准零刚度隔振系统模型的动力学分析,建立该系统在简谐力激励下的非线性动力学方程,通过谐波平衡法求出系统力传递率,分析了系统中阻尼比、立方非线性项、外部干扰幅值对系统力传递率的影响;最后,与传统的线性隔振系统进行对比,验证了该新型准零刚度系统的可行性。
This paper presents a new type of quasi zero stiffness vibration isolation system composed of permanent magnets and tension springs,which is designed for low frequency or ultra-low frequency vibration isolation of precision equipment such as grating scoring machines.Based on the static model of the system,we obtain the required conditions for the system to meet the quasi zero stiffness,and analyze the influence of various structural parameters on the vibration isolation performance.Through the dynamic analysis of the quasi-zero stiffness vibration isolation system model,the nonlinear dynamic equation of the system under the excitation of simple harmonic force is established.The force transmission rate of the system is obtained by the harmonic balance method.The effects of damping ratio,cubic nonlinear term and external interference amplitude on the force transmission rate of the system are analyzed.
作者
施勇
葛新方
金亮
SHI Yong;GE Xinfang;JIN Liang(School of Mechanical Engineering,Hefei University of Technology,Heifei 230009,China)
出处
《机械工程师》
2024年第5期21-25,共5页
Mechanical Engineer
基金
国家自然科学基金项目“大面积衍射光栅刻划机多环境元素耦合振动的传递机理与控制技术基础研究”(51705117)。
关键词
准零刚度
低频隔振
永磁铁
谐波平衡法
quasi zero stiffness
low frequency vibration isolation
permanent magnet
harmonic balance method
