Simulation Study on Vibration Absorption Efficiency of Parallel Nonlinear Energy Sinks

doi:10.16182/j.issn1004731x.joss.201809023

Abstract

Abstract: Parallel nonlinear energy sinks are used to suppress the vibration of the primary structure. The vibration absorption efficiencies of the single and parallel NESs are comparatively investigated. The dynamic equation under harmonic excitation is derived and the dynamic responses are analyzed by using numerical method. Through studying the influences of the installation locations and parameters of the single and parallel NESs respectively, it is found that, under normal temperature, the vibration absorption efficiency of the parallel NESs is better than that of the single NES which having the equal mass with the former absorber. Considering that the resonance frequency of the primary structure varies along with temperature, the stiffnesses of the single and parallel NESs are optimized under different temperatures. The results indicate that the parallel NESs always has the higher vibration absorption efficiency than that of the single NES, and the advantage of the parallel NESs is more obvious when the primary structure is under the higher temperature.

Key words: parallel nonlinear energy sinks, thermal environment, harmonic excitation, efficiency

CLC Number:

O322
O327

Chen Jian’en, He wei, Ge Weimin, Liu Jun, Zhong Rui. Simulation Study on Vibration Absorption Efficiency of Parallel Nonlinear Energy Sinks[J]. Journal of System Simulation, 2018, 30(9): 3411-3419.

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