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Force transmissibility of a 6-DOF passive quasi-zero stiffness vibration isolation platform

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Abstract

A compression bar-type quasi-zero stiffness (QZS) element is designed on the basis of the parallel principle of positive and negative stiffness by combining disc spring and coil spring. A vibration isolation platform supported by the compression bar type QZS element is constructed. First, the static analyses of the compression bar-type QZS element and QZS vibration isolation platform are investigated, and the force-displacement equations of each degree of freedom (DOF) of the QZS platform are derived. Second, the force transmissibility and dynamic characteristics under harmonic excitation are analyzed in detail and made a comparison with those of the equivalent linear isolation system. Results show that the vibration isolation performance (VIP) of the QZS isolation system is superior to that of the equivalent linear isolation system. The low-frequency VIP of the QZS system can be enhanced by increasing damping, reducing the stiffness ratio, or changing installation angle.

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Acknowledgments

This work is supported by the financial support from the Beijing Municipal Natural Science Foundation (No. 1182010), Open Topic Funding Project of Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology (FM-201802), Top-notch Team Funding Project of Excellent Talents Plan of Xicheng District of Beijing and 2020 Research and Innovation Plan for Graduate Students in Jiangsu Province (KYCX20_ 1927).

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Authors and Affiliations

  1. Beijing Key Laboratory of Environmental Noise and Vibration, Beijing Municipal Institute of Labor Protection, Beijing, 100054, China

    Yanqi Liu

  2. College of Mechanical Engineering, Jiangnan University, Key Laboratory of Advanced Food Manufacturing Equipment Technology, Wuxi, Jiangsu, 214122, China

    Wen Ji, Huangsen Gu, Erjie Deng, Xin Wang & Chunfang Song

Authors
  1. Yanqi Liu
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  2. Wen Ji
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  3. Huangsen Gu
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  4. Erjie Deng
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  5. Xin Wang
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  6. Chunfang Song
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Corresponding author

Correspondence to Chunfang Song.

Additional information

Yanqi Liu is an Associate Professor of Beijing Key Laboratory of Environment Noise and Vibration, Beijing Municipal Institute of Labor Protection, Beijing, China. She received her Ph.D. in Mechanical Engineering from Beijing University of Technology. Her research interests include mechanical dynamics, nonlinear dynamics.

Chunfang Song is a Professor of Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment and Technology, School of Mechanical Engineering, Jiangnan University, Wuxi, China. She received her Ph.D. in Engineering College from China Agricultural University. Her research interests include mechanical dynamics, nonlinear vibration and control.

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Liu, Y., Ji, W., Gu, H. et al. Force transmissibility of a 6-DOF passive quasi-zero stiffness vibration isolation platform. J Mech Sci Technol 35, 2313–2324 (2021). https://doi.org/10.1007/s12206-021-0504-5

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  • DOI: https://doi.org/10.1007/s12206-021-0504-5

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