A negative stiffness mechanism consisting of a spring and cylinder is proposed, and a grounded dynamic vibration absorber is designed based on a quasi-zero stiffness vibration isolator to constitute the vibration isolator with a vibration absorber system. The range of parameters for attaining zero stiffness is derived from static analysis. The dynamic analysis of the vibration isolator with a vibration absorber system is carried out by a multiscale method, and the amplitude–frequency response equation of the system is obtained. The influence of different system parameters on the amplitude–frequency response is analyzed. The amplitude–frequency response of the quasi-zero stiffness vibration isolator is compared with that of the vibration isolator with a vibration absorber, and the linear and nonlinear analytical solutions of the vibration isolator with a vibration absorber system are also compared. The results show that the designed vibration isolator with a vibration absorber is an ideal choice for low-frequency vibration isolation, with no large resonance peak throughout the system and significantly improved reliability of the system.

提出了一种由弹簧和气缸组成的负刚度机构，并在准零刚度隔振器的基础上设计了接地动态吸振器，构成了隔振器和减振系统。获得零刚度的参数范围是从静态分析中得出的。采用多尺度方法对带减振系统的隔振器进行动态分析，得到系统的幅频响应方程。分析了不同系统参数对幅频响应的影响。将准零刚度隔振器的幅频响应与带减振器的隔振器的幅频响应进行了比较，并且还比较了带减振器的隔振器系统的线性和非线性解析解。结果表明，所设计的带减振器的隔振器是低频隔振的理想选择，整个系统没有大的共振峰值，显着提高了系统的可靠性。