Characteristics of negative stiffness of vibration isolation for a quasi-zero stiffness suspension system

doi:10.3969/j.issn.1674-8484.2022.04.008

Abstract

Abstract:

A quasi-zero stiffness suspension system was proposed with a parallel connection of magnetic ring negative stiffness mechanism and positive stiffness spring to improve rider comfort during driving of mine passenger vehicles by aiming at the characteristics of low-frequency and large-amplitude vibration of mine transport vehicles. An analytical model of negative stiffness was derived by equivalent magnetic charge method to investigate the magnetic negative stiffness mechanism. Based on Maxwell software, a simulation model of the magnetic ring negative stiffness mechanism was established to analyze the effects of the magnetic conductivity device, magnet geometry parameters, magnetizing direction and remanent magnetic strength on the magnetic negative stiffness mechanism. The application matching research of the quasi-zero stiffness suspension system was carried out by taking a body of mine transport vehicle as an example. The results show that the suspension system has a large load-bearing capacity when subjected to static forces and a small dynamic stiffness when subjected to excitation forces. The magnetic negative stiffness mechanism is conducive to realize the high static and low dynamic characteristics of the suspension system, and has important application value for the design of new suspension systems.

Key words: suspension system, vibration isolation mechanism, quasi-zero stiffness, vibration isolator

CLC Number:

TK402

DU Xianfeng, MA Xiyang, SUI Xi, WANG Yunlong, SHI Yunxu. Characteristics of negative stiffness of vibration isolation for a quasi-zero stiffness suspension system[J]. Journal of Automotive Safety and Energy, 2022, 13(4): 667-675.

Figures/Tables 17

References 19

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磁环参数	上磁环	中磁环	下磁环
外环半径，R / mm	30	30	30
内环半，r / mm	10	10	10
厚度，l / mm	20	20	20
剩磁，B_r / T	1.15	1.15	1.15

磁环参数	上磁环	中磁环	下磁环
外环半径，R / mm	30	30	30
内环半，r / mm	10	10	10
厚度，l / mm	20	20	20
剩磁，B_r / T	1.15	1.15	1.15

悬置位置	m / kg	K_x / (N·mm^-1)
#1	490	40.11
#2	430	35.20
#3	380	31.11
#4	320	26.20
#5	480	39.29
#6	420	34.38
#7	360	29.47
#8	310	25.38

悬置位置	m / kg	K_x / (N·mm^-1)
#1	490	40.11
#2	430	35.20
#3	380	31.11
#4	320	26.20
#5	480	39.29
#6	420	34.38
#7	360	29.47
#8	310	25.38

磁环参数	上磁环	中磁环	下磁环
外环半径, R / mm	69	69	69
内环半径, r / mm	10	10	10
厚度, l / mm	20	20	20
剩磁, B_r / T	1.15	1.15	1.15