Figure - available from: Advances in Mechanical Engineering
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The damping enhancement effect of the inerter system means that its energy dissipation efficiency can be improved with respect to the traditional dampers. Energy dissipation efficiency have been considered as the optimal design principle of the inerter system, however, the solution for optimized key parameters is difficult because of the special me...
Citations
... Unlike mass, an inerter provides a significantly larger and more adjustable inertance coefficient than its mass. The inerter has been widely used in vibration reduction design [19][20][21][22][23][24][25]. However, an NES with an inerter still has a large mass defect [26]. ...
In this paper, a novel negative stiffness inertial nonlinear energy sink (NSI-NES) is proposed. The main structure is simulated as a single-degree-of-freedom linear oscillator. Newton's second law is applied to derive the kinematic equations of the coupled system. Based on the Runge–Kutta numerical solution, the complex dynamical behaviors of the system coupled with the NSI-NES are explored. Moreover, the quasiperiodic solution exhibited a strongly modulated response (SMR). The steady-state response of the system is obtained using the Runge–Kutta and harmonic balance methods and is cross-corroborated. Compared with the inertial nonlinear energy sink (I-NES) and the positive stiffness inertial nonlinear energy sink (PSI-NES), the damping effects of the NSI-NES are highlighted based on various excitations. The results show that the NSI-NES has a damping effect of up to 90%. In addition, the effect of the NSI-NES parameters on the damping effect is discussed. In general, the negative stiffness element can significantly improve NES performance. Therefore, this study promotes the application of negative stiffness and inerter in engineering.
