Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 166-188 |
| Number of pages | 23 |
| Journal | Mechanical Systems and Signal Processing |
| Volume | 80 |
| Online published | 14 Apr 2016 |
| DOIs | |
| Publication status | Published - 1 Dec 2016 |
| Externally published | Yes |
Funding
The authors would like to thank the editors and reviewers for their useful comments and constructive suggestions on this paper, and also gratefully acknowledge the support from a NSF project (Ref 61374041) of China, a GRF project (Ref 15206514) of Hong Kong RGC and internal research Grants of Hong Kong Polytechnic University.
Research Keywords
- Vibration isolation
- Nonlinear stiffness and damping
- Structural nonlinearity
- Anti-resonance
- QUASI-ZERO-STIFFNESS
- ISOLATION SYSTEM
- SEAT SUSPENSION