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Dynamic characteristics and experimental study of double layer vibration isolation system

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Abstract

To improve the isolation ability of the existing equipment for low-frequency line spectrum, this paper presents an electromagnetic double-layer vibration isolation system (ED-VIS) for the first time. The negative and positive stiffness values of the ED-VIS are provided by the electromagnet and the linear spring, respectively. To better analyze the vibration isolation system designed in this paper, the dynamic model of the ED-VIS is established, and the effects of damping ratio, excitation force amplitude, and mass ratio on the force transmissibility feature of the isolator are analyzed. Then, the ED-VIS test bench is built, and the low-frequency vibration isolation capability of the ED-VIS is measured by a frequency sweep test. According to the sweep test results, a method to improve the low-frequency vibration isolation capability of the isolator is proposed. Finally, the reliability of the system in isolating low-frequency vibration is verified. The results show that compared with the equivalent linear vibration isolation system, ED-VIS is more sensitive to low-frequency vibration and has a lower initial vibration isolation frequency. Therefore, this paper designs the ED-VIS has better low-frequency vibration isolation performance.

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Abbreviations

E-QZS :

Electromagnetic quasi-zero stiffness

D-VIS :

Double-layer vibration isolation system

ED-VIS :

Electromagnetic double vibration isolation system

F :

Excitation amplitude

w :

Mass ratio

I :

Current

ξ 1 :

Damping ratio

Ω :

Excitation frequency

K 1 :

Negative stiffness of QZS vibration isolator

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Acknowledgments

The authors are grateful to the Natural Science Foundation of Hubei Province of China (2022CFB405).

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Authors and Affiliations

  1. College of Power Engineering, Naval University of Engineering, Wuhan, 430033, China

    M. T. Wang, K. Chai, S. Y. Liu, Q. C. Yang, T. F. Zhang & W. R. Shi

Authors
  1. M. T. Wang
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  2. K. Chai
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  3. S. Y. Liu
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  4. Q. C. Yang
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  5. T. F. Zhang
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  6. W. R. Shi
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Corresponding author

Correspondence to S. Y. Liu.

Additional information

Wang MengTong is a master’s student at the Naval University of Engineering. He is affiliated with the College of Power Engineering. His research interests include nonlinear vibration and control.

Liu ShuYong is an Associate Professor at the Naval University of Engineering. He is affiliated with the College of Power Engineering. His research interests include nonlinear vibration and control and chaotic weak fault signal processing.

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Wang, M.T., Chai, K., Liu, S.Y. et al. Dynamic characteristics and experimental study of double layer vibration isolation system. J Mech Sci Technol 37, 1699–1709 (2023). https://doi.org/10.1007/s12206-023-0311-2

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  • DOI: https://doi.org/10.1007/s12206-023-0311-2

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