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High-static-low-dynamic-stiffness vibration isolation enhanced by damping nonlinearity

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Abstract

High-static-low-dynamic-stiffness (HSLDS) nonlinear isolators have proven to have an advantage over linear isolators, because HSLDS nonlinear isolators allow low-frequency vibration isolation without compromising the static stiffness. Previously, these isolators have generally been assumed to have linear viscous damping, degrading the performance of the isolator at high frequencies. An alternative is to use nonlinear damping, where the nonlinear behavior is achieved by configuring linear dampers so they are orthogonally aligned to the excitation direction. This report compares the performances of single-stage and two-stage isolators with this type of damping with the corresponding isolators containing only linear viscous damping. The results show that both isolators with linear viscous damping and nonlinear damping reduce the transmissibility around the resonance frequencies, but the results show that the isolators with nonlinear damping perform better at high frequencies.

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Authors and Affiliations

  1. Shanghai Institute of Applied Mathematics and Mechanics, Shanghai University, Shanghai, 200072, China

    ZeQi Lu, Hu Ding & LiQun Chen

  2. Departamento de Engenharia Mecânica, Universidade Estadual Paulista (UNESP), Ilha Solteira (SP), 56-15385-000, Brasil

    Michael Brennan

  3. Department of Mechanics, Shanghai University, Shanghai, 200444, China

    LiQun Chen

  4. Shanghai Key Laboratory of Mechanics in Energy Engineering, Shanghai University, Shanghai, 200072, China

    ZeQi Lu, Hu Ding & LiQun Chen

Authors
  1. ZeQi Lu
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  2. Michael Brennan
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  3. Hu Ding
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  4. LiQun Chen
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Correspondence to LiQun Chen.

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Lu, Z., Brennan, M., Ding, H. et al. High-static-low-dynamic-stiffness vibration isolation enhanced by damping nonlinearity. Sci. China Technol. Sci. 62, 1103–1110 (2019). https://doi.org/10.1007/s11431-017-9281-9

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  • DOI: https://doi.org/10.1007/s11431-017-9281-9

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