A typical quasi-zero-stiffness (QZS) vibration isolator composed of two lateral springs and a vertical spring has been widely studied in previous literature, in which the dynamic equation is usually formulated with linear viscous damping. However, in practical applications, the damping may be generated from many sources and thus deserves special study. In this paper, a dynamic model with consideration of three main damping generation mechanisms is established to give further insights into the damping characteristics of this typical QZS isolator. The dynamic response and stability are analyzed based upon the newly formulated dynamic equation. The effects of the damping characteristics on the vibration isolation performance are investigated. It is shown that the QZS isolator can exhibit hardening or softening damping properties by tuning parameters of the three damping sources, and the hardening damping is beneficial for the overall isolation performance.

在以前的文献中已经广泛研究了由两个侧向弹簧和一个垂直弹簧组成的典型的准零刚度（QZS）隔振器，其中动力学方程通常由线性粘性阻尼公式化。但是，在实际应用中，阻尼可能来自多种来源，因此值得特别研究。在本文中，建立了考虑三个主要阻尼产生机理的动力学模型，以进一步了解这种典型QZS隔离器的阻尼特性。根据新制定的动力学方程分析了动力学响应和稳定性。研究了阻尼特性对隔振性能的影响。