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Frictional phenomena within a quasi zero stiffness vibration device
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G. Gatti ,
P.J.P. Gonçalves ,
B. Tang ,
M.J. Brennan
Mechanical Systems and Signal Processing, Volume: 211, Start page: 111113
Swansea University Author:
Alexander Shaw
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DOI (Published version): 10.1016/j.ymssp.2024.111113
Abstract
Quasi Zero Stiffness (QZS) devices have received widespread interest due to their potential applications in vibration isolation and as nonlinear energy sinks. However, as the stiffness is driven towards zero, the response becomes dominated by the effects of damping and friction. This places a strong...
| Published in: | Mechanical Systems and Signal Processing |
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| ISSN: | 0888-3270 |
| Published: |
Elsevier BV
2024
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| Online Access: |
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| URI: | https://cronfa.swan.ac.uk/Record/cronfa65411 |
| Abstract: |
Quasi Zero Stiffness (QZS) devices have received widespread interest due to their potential applications in vibration isolation and as nonlinear energy sinks. However, as the stiffness is driven towards zero, the response becomes dominated by the effects of damping and friction. This places a strong emphasis on accurate modelling of these effects if realistic results are to be achieved. This work analyses and experimentally demonstrates the complex responses that can occur in a frictional QZS device, including isolated response regions and non-sinusoidal responses. This is done using a simple device recently developed by the authors that allows accurate adjustment of the nonlinear force–displacement curve. Furthermore, high frequency disturbances on the frictional system are shown to introduce a damping effect on the low frequency behaviour, and an equivalent linear damping coefficient is derived. |
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| Item Description: |
Data availability:Data used in this work may be found at https://doi.org/10.5281/zenodo.10340200. |
| Keywords: |
Quasi Zero Stiffness; Isolation; Friction; Isola; Nonlinear vibration |
| College: |
Faculty of Science and Engineering |
| Funders: |
This work was supported by the Royal Academy of Engineering, United Kingdom under the Distinguished Visiting Fellowships - Round 6, and also by EPSRC, United Kingdom grant EP/R006768/1 ‘Digital twins for improved dynamic design’. Data used in this work may be found at https://doi.org/10.5281/zenodo.10340200. |
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111113 |