Performance study on the secondary suspension system of a suspended monorail vehicle based on the quasi-zero-stiffness theory

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Journal of Vibration and Shock ›› 2019, Vol. 38 ›› Issue (2) : 13-17.

CHEN Zhihui1,2,ZHAI Wanming1,ZHU Shengyang1,LV Kaikai1

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Abstract

Secondary suspension system is one of the important parts to ensure the safe and stable operation of a suspended monorail vehicle.Based on the the quasi-zero-stiffness(QZS) and multi-body dynamics theory,a vertical model of the suspended monorail vehicle with a secondary suspension system holding QZS characteristic was established and the vertical vibration equations were deduced.Then the vibration isolation characteristics of the secondary suspension systems with QZS and traditional linear stiffness characteristics were further studied comparatively by adopting the dynamic model.The following conclusions are drawn that the QZS of the secondary suspension system for the suspended monorail vehicle can be realized by using a parallel oblique spring with vertical elastic elements.The vertical dynamic responses of the vehicle with QZS system are obviously lower than those with the traditional linear stiffness system,and the low frequency vibration isolation performance is satisfactory.

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Key words

suspended monorail vehicle / secondary suspension system / quasi-zero-stiffness / vibration isolation characteristic

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CHEN Zhihui1,2,ZHAI Wanming1,ZHU Shengyang1,LV Kaikai1. Performance study on the secondary suspension system of a suspended monorail vehicle based on the quasi-zero-stiffness theory[J]. Journal of Vibration and Shock, 2019, 38(2): 13-17

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