A study on the effects of particle impact forms on energy dissipation of dampers

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (24) : 138-143.

SONG Xiaoyu，YIN Zhongjun，CHEN Bing

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Abstract

In order to reveal the dependence between the impact forms and the loss power, the motion patterns of the particles in cylinder and conical containers were reproduced through the discrete element method, and the difference between the impact forms and the energy loss caused by different forms of particle motion was explored.The results show that compared with a cylinder container, the movement of the particles in a conical container has obvious regional characteristics.This special form of motion has a certain inhibitory effect on the impact subharmonic bifurcations, so that the impact form on the system is expressed as “Small and dense” type.The energy consumption results show that the energy loss caused by this “small and dense” impact mode is higher than that of the “large and sparse” type of impact in the cylinder container, and the energy consumption difference between the two increases with the vibration intensity.The significant effect of the impact form on the power loss is further verified by analyzing the gradual process of the container inclination.

Key words

particle damping / impact forms / energy dissipation / conical container

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SONG Xiaoyu，YIN Zhongjun，CHEN Bing. A study on the effects of particle impact forms on energy dissipation of dampers[J]. Journal of Vibration and Shock, 2019, 38(24): 138-143

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