Abstract—This paper proposes a Quasi-Zero-Stiffness (QZS) vibration isolator with asymmetric stiffness and geometric nonlinear damping. The nonlinear stiffness and nonlinear damping characteristics of proposed model are studied. The motion equation of proposed system under force excitation is established, and its dynamic response is solved by the Harmonic Balance Method (HBM). In addition, the influence of nonlinear damping on force transmissibility is studied. The results indicate that the proposed isolator has a large equivalent damping ratio in the resonance region and a small equivalent damping ratio in the high-frequency region. Therefore, the proposed asymmetrical QZS isolator with nonlinear damping can supress the resonance in low-frequency under force excitation and achieve a good high-frequency vibration isolation effect simultaneously than that with linear damping.
 

Index Terms—quasi-zero stiffness, geometrical nonlinear damping, vibration isolation, asymmetrical stiffness

Cite: Chuanyun Yu and Jianrun Zhang, "The Vibration Isolation Properties of an Asymmetrical Quasi-Zero Stiffness Isolator with Geometrical Nonlinear Damping," International Journal of Electrical and Electronic Engineering & Telecommunications