Journal
MECHANICAL SYSTEMS AND SIGNAL PROCESSING
Volume 80, Issue -, Pages 166-188Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ymssp.2016.04.011
Keywords
Vibration isolation; Nonlinear stiffness and damping; Structural nonlinearity; Anti-resonance
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Funding
- NSF of China [61374041]
- GRF of Hong Kong RGC [15206514]
- Hong Kong Polytechnic University
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This study investigates theoretically and experimentally a vibration isolator constructed by an n-layer Scissor-Like Structure (SLS), focusing on the analysis and design of nonlinear stiffness and damping characteristics for advantageous isolation performance in both orthogonal directions. With the mathematical modeling, the influence incurred by different structural parameters on system isolation performance is studied. It is shown that, (a) nonlinear high-static-low-dynamic stiffness and damping characteristics can be seen such that the system can achieve good isolation performance in both directions, (b) an anti-resonance frequency band exists due to the coupling effect between the linear and nonlinear stiffness in the two orthogonal directions within the structure, and (c) all these performances are designable with several structural parameters. The advantages of the proposed system are shown through comparisons with an existing quasi-zero-stiffness vibration isolator (QZS-VI) and a traditional mass-spring-damper vibration isolator (MSD-VI), and further validated by experimental results. (C) 2016 Elsevier Ltd. All rights reserved.
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