Equivalent model and experimental verification of a multi-particle damper with inerter

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Journal of Vibration and Shock ›› 2021, Vol. 40 ›› Issue (18) : 102-111.

HUANG Xuhong，XU Weibing，WANG Jin，YAN Weiming，CHEN Yanjiang

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Abstract

Based on the study of the existing equivalent single particle mechanical model of a multi-particle damper (M-PD), an equivalent single particle model with an inerter (EISM) was established to consider the rolling effect of particles on the damping performance of the M-PD.The motion state of a single-degree-of-freedom structure with the M-PD under harmonic and seismic excitation was investigated by the use of the Runge-Kutta algorithm.Shaking table tests of a single-layer steel frame with the M-PD was designed and conducted.The influence of filling rate on the displacement frequency response curve of the top of the structure was explored.The principle for determining the EISM’s parameters in non stacking state was proposed, and then the experimental and theoretical verification on the EISM were carried out based on the above testing results and the analysis results by the existing equivalent single particle model.On this basis, the damping effect and energy change of the M-PD were analysed based on the EISM under different excitation, such as free vibration, harmonic and seismic excitation.The results show that the EISM can further reflect the complex damping effect and damping mechanism of M-PD, and the proposed parameter evaluation principle is more suitable for the numerical simulation of the M-PD in non stacking state.The M-PD has better damping effect under different excitation conditions, but the existing equivalent single particle model may overestimate the damping effect of M-PD with the optimal impact distance.

Key words

multi-particle damper(M-PD) / equivalent model / inerter / non stacking state / damping effect

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HUANG Xuhong，XU Weibing，WANG Jin，YAN Weiming，CHEN Yanjiang. Equivalent model and experimental verification of a multi-particle damper with inerter[J]. Journal of Vibration and Shock, 2021, 40(18): 102-111

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