Parameter Optimization for a Novel Inerter-based Dynamic Vibration Absorber with Negative Stiffness

• DOI: 10.1007/s44198-022-00042-z
• Publication Date: 2022-03-01T11:03:00Z
• Authors: Jing Li; Xueqing Gu; Shaotao Zhu; Changlong Yu; Xiaodong Yang
• Keywords: 02 engineering and technology; 0201 civil engineering

AbstractA novel dynamic vibration absorber(DVA) model with negative stiffness and inerter-mass is presented and analytically studied in this paper. The research shows there are still two fixed points independent of the absorber damping in the amplitude frequency curve of the primary system when the system contains negative stiffness and inerter-mass. The optimum frequency ratio is obtained based on the fixed-point theory. In order to ensure the stability of the system, it is found that inappropriate inerter coefficient will cause the system instable when screening optimal negative stiffness ratio. Accordingly, the best working range of inerter is determined and optimal negative stiffness ratio and approximate optimal damping ratio are also obtained. At last the control performance of the presented DVA is compared with three existing typical DVAs. The comparison results in harmonic and random excitation show that the presented DVA could not only reduce the peak value of the amplitude-frequency curve of the primary system significantly, but also broaden the efficient frequency range of vibration mitigation.