圆环非线性隔振设计和动力学研究

Nonlinear relation between force and deformation via specific shape ring is a shortcut way for implementation of quasi-zero stiffness vibration isolation. In this paper, buckling deformation of the circular ring is adopted to achieve the quasi-zero stiffness. The novelty of the design is introduction of horizontal stiffness and horizontal damping. The expressions for frequency response and displacement transmissibility of the circular ring design are given based on the method of direct separation of motion, the numerical validation of the analytical results is also carried out. The developed vibration isolation approach is successfully implemented to change the path of vibration transmission in order to attenuate the transmitted motion. The results show that the horizontal stiffness could extend the isolation range to lower frequencies, and horizontal damping could reduce the resonance response. The developed circular ring beam vibration isolator reduces the transmissibility around the resonance frequency, and performs better at higher frequencies.