In-plane quasi-zero-stiffness vibration isolator using magnetic interaction and cables: Theoretical and experimental study

Liu, Chaoran; Zhao, Rui; Yu, Kaiping; Liao, Baopeng

doi:10.1016/j.apm.2021.03.035

Cited by 54 publications

(11 citation statements)

References 58 publications

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“…Vibration isolators are capable of isolating an object or equipment from the source of vibrations. 57,58 Through the application of MREs, the mechanical properties can be tuned in real-time via an external magnetic field. Zhu et al investigated both experimental and modeling studies of the magnetic field-induced viscoelastic properties of MRE act under different loading cases conditions.…”

Section: Absorter Isolationmentioning

confidence: 99%

A review on magnetorheological elastomers

Liu¹

2023

AETR

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Magnetorheological Elastomers (MREs) are a type of magnetorheological (MR) material, which is a combination of magnetic particles and a soft elastic matrix. As a new class of intelligent material, MREs possess controllability, reversibility, rapid response as well as stability under magnetic fields. Thanks to these characteristics, MREs have found a wide range of applications in many fields, such as vibration absorbers, absorber isolation, pumps, and soft robots in recent years. All these applications will be discussed in this review. Additionally, this paper will describe the effects of particles, matrices, additives, and synthesis on the performance of MREs.

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Section: Absorter Isolationmentioning

confidence: 99%

A review on magnetorheological elastomers

Liu¹

2023

AETR

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“…If the frequency band of vibration isolation is only slightly wider than that of the corresponding linear isolator, high transmissibility and large response amplitude would appear under excitations with low frequency. In view of the QZS isolator composed of one pair of oblique springs, many evolved QZS isolators have been developed, for example, isolators composed of one pair of oblique bars (Le and Ahn, 2013; Liu and Yu, 2020), a double layer structure constituted by one pair of oblique springs (Liu et al, 2021b; Lu et al, 2017), QZS isolators with one pair of buckled beams (Fulcher et al, 2014; Huang et al, 2014), two cross extension or compression springs (Shaw et al, 2021; Wang et al, 2021), multiple three-springs (Ding et al, 2019; Wang et al, 2020b), and oblique springs with an inerter element (Liu et al, 2021c; Yang et al, 2019). These evolved QZS isolators greatly improved performance of vibration isolation, but their QZS ranges were changed only slightly (Xu et al, 2014; Zhou et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Enhanced design of the quasi-zero stiffness vibration isolator with three pairs of oblique springs: Theory and experiment

Zhao

Cao

Luo

et al. 2022

Journal of Vibration and Control

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Quasi-zero stiffness vibration isolators have been extensively studied due to superior passive vibration isolation performance. As the quasi-zero stiffness region of the isolators is generally small, the research on their responses to the excitation with high amplitude is currently quite limited. This paper presents an improved design of the quasi-zero stiffness isolator with three pairs of oblique springs to increase the amplitude of the excitation. Theoretical formulations are derived for stiffness and force, and then the influences of three independent parameters on the quasi-zero stiffness region are studied to obtain optimal design parameters. A prototype is fabricated and tested for displacement excitations with amplitudes of 5 mm, 10 mm, and 15 mm in a frequency range of 1.5–10 Hz. The absolute displacement transmissibility of the enhanced quasi-zero stiffness isolator is theoretically and experimentally compared with that of the corresponding linear isolator and that of the previous isolators with three pairs of oblique springs using the same parameter conditions of the loaded mass, the horizontal length of oblique springs, and the vertical spring. The experimental results show that the enhanced design of the quasi-zero stiffness isolator with three pairs of oblique springs can achieve lower displacement transmissibility and deal with the displacement excitation with higher amplitude.

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“…Recently, Wang et al [16,17] combined the diamond-shaped negative stiffness structure and inertial dampers to design a new type of inertial-based QZS isolator, which has good nonlinear stiffness characteristics and mass amplification effects and can achieve superior vibration isolation performance. In the past decade, magnets have gradually become the focus of research topics due to their noncontact and nonfriction characteristics [18][19][20][21]. Furthermore, the coil winding is used instead of the magnet to improve the controllability of the isolator [22][23][24][25].…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of a Novel Quasi-Zero Stiffness Isolator under Variable Loads

Xie¹,

Niu²,

Sun³

et al. 2022

Mathematical Problems in Engineering

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The designed load of most quasi-zero stiffness (QZS) isolators is constant. The isolation performance will drop sharply once the load changes. A novel QZS isolator that can adapt to variable loads is proposed in this paper to improve the range of application of the isolator. The isolator is designed by paralleling the electromagnetic spring (ES), which provides negative stiffness, and the pneumatic spring (PS), which provides positive stiffness. The positive and negative stiffness can be adjusted by changing the pressure and coil current, which provides the possibility for the isolator to adapt to variable loads. This paper derived the conditions for the isolation system to obtain QZS characteristics, proposed the dynamic model of the isolation system, derived and verified the analytical expressions of the amplitude-frequency response and force transmissibility (FT), and discussed the change of FT and displacement transmissibility(DT) under different loads. Theoretical analysis shows that changing the pressure and coil current in the same proportion can maintain the superior low-frequency isolation performance when the load changes, thanks to the preservation of the QZS characteristics of the system after adjusting the pressure and coil current. Finally, the simulation results fg and isolation frequency band over the linear isolation system and PS isolation system. Furthermore, the proposed isolator can be adjusted online.

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In-plane quasi-zero-stiffness vibration isolator using magnetic interaction and cables: Theoretical and experimental study

Cited by 54 publications

References 58 publications

A review on magnetorheological elastomers

A review on magnetorheological elastomers

Enhanced design of the quasi-zero stiffness vibration isolator with three pairs of oblique springs: Theory and experiment

Design and Analysis of a Novel Quasi-Zero Stiffness Isolator under Variable Loads

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