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Research on the dynamics and damping performance of parallel nonlinear energy sink cells
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Research on the dynamics and damping performance of parallel nonlinear energy sink cells
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Journal Article
Research on the dynamics and damping performance of parallel nonlinear energy sink cells
2025
Overview
Nonlinear energy sink (NES) has attracted considerable attention due to its advantages, including broad vibration reduction bandwidth and no need for additional energy consumption. However, for a primary system subjected to external excitation, the nonlinear mechanism of the NES requires the input energy to exceed a certain threshold to initiate energy transfer, and a single NES may be insufficient to meet the damping requirements of large-scale engineering structures. Therefore, this paper investigates the dynamics and vibration suppression performance of parallel NES cells under harmonic excitation. Taking connecting two cells as an example, the slow variation equation is derived by applying the complexification-averaging method. The boundary condition for saddle-node bifurcation is obtained, and the stability of steady-state solutions is analyzed. Moreover, the response characteristics within the resonance region are simulated using the fourth-order Runge-Kutta method. Finally, the damping performance of the proposed parallel configuration is analyzed. Numerical results indicate that increasing the number of cells can significantly enhance vibration attenuation efficiency.
Publisher
IOP Publishing
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