The Design and Analysis of a Novel Passive Quasi-Zero Stiffness Vibration Isolator

Abstract

Purpose

This project aims to design a novel passive quasi-zero stiffness vibration isolator (QZS-VI) and analyze the static and dynamic mechanical properties of the QZS-VI.

Methods

First, a novel combination of V-shaped lever, plate spring and cross-shaped structure (VL-PS-CS) vibration isolation platform is designed, and a nonlinear QZS-VI is built by parallel connecting VL-PS-CS and coil spring. Second, the static and dynamic modeling of QZS-VI are derived considering the geometrical nonlinearity of V-shaped lever and the large deflection of plate spring, and the average method is applied to obtain the displacement transmissibility. Third, the effects of different structural parameters (e.g., the lengths of long arm and short arm of V-shaped lever, the assembly angle between two arms, the thickness of plate spring) on the static mechanical and equivalent nonlinear friction properties of QZS-VI are thoroughly investigated. Finally, the vibration isolation performance of the designed QZS-VI is compared with another QZS-VI of buckled beam mechanism and traditional linear vibration isolator.

Results

The QZS-VI with VL-PS-CS fully explores the nonlinear advantages of plate spring and V-shaped lever and can achieve excellent high static and low dynamic stiffness and nonlinear friction properties. The superior static mechanical properties and nonlinear friction of QZS-VI can be tuned with different structural parameters. The designed QZS-VI exhibits much smaller resonant frequency, lower peak value and more stability property at the peak frequency than other isolators due to its special nonlinear friction and stiffness properties.

Conclusions

The designed QZS-VI is practical, novel and suitable for low-frequency vibration isolation. The innovative structure provides novel insights into the design of passive vibration isolators and has great potential for application in engineering practice.

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Data availability

The datasets supporting the conclusions of this article are included within the article and in Supplementary Material.

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Acknowledgements

This work was supported by the National Key R&D Program of China (No. 2016YFC0802902).

Funding

This work was supported by the National Key R&D Program of China (No. 2016YFC0802902).

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Authors

Contributions

DZ and XS initiated this study and proposed the design of this work; XZ designed the structure, performed research, derived the modeling and wrote the manuscript; KT and XY assist with design. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Dingxuan Zhao.

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The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.

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Cite this article

Zhou, X., Sun, X., Zhao, D. et al. The Design and Analysis of a Novel Passive Quasi-Zero Stiffness Vibration Isolator. J. Vib. Eng. Technol. (2020). https://doi.org/10.1007/s42417-020-00221-6

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Keywords

  • Vibration isolator
  • High static and low dynamic stiffness
  • V-shaped lever
  • Plate spring