Design, analysis and experimental validation of high static and low dynamic stiffness mounts based on target force curves
Design, analysis and experimental validation of high static and low dynamic stiffness mounts based on target force curves
In order to improve vibration isolation, soft components can be used in engineering applications, but this can lead to excessive static deflection. An ideal vibration isolator should have a high static stiffness to ensure that it has sufficient load carrying capacity; at the same time, it should have a low dynamic stiffness to maximize the vibration isolation frequency range. Recently, high static and low dynamic stiffness (HSLDS) mounts have been increasingly shown to have significant benefits for various engineering applications. This paper proposes a method for designing HSLDS mounts based on target force curves. In the design method, the HSLDS mount is obtained by placing a negative stiffness structure in parallel with a positive stiffness linear spring. The negative stiffness structure is achieved by using a roller-slider curve which can be designed according to the requirements to achieve the target force curve. HSLDS mounts are proposed with nth-order stiffness behavior which are designed using the method presented here. The results show that, compared with lower order HSLDS mounts based on the same static stiffness, higher order HSLDS mounts have lower dynamic stiffness near the equilibrium position. The Average Method is used to analyze the dynamics of a system based on the nth-order HSLDS mounts, and the displacement transmissibility under harmonic excitation is obtained. The effects of different parameters on the transmissibility are studied. The results show that appropriately increasing the damping ratio is beneficial for the isolation performance of the HSLDS mount. Finally, an experimental prototype is designed and manufactured. The proposed design method and the vibration isolation performance of the HSLDS mount are verified by constant-frequency excitation experiments.
Experimental Verification, High Static and Low Dynamic Stiffness, Nonlinear Transfer Function, Target Force Curve, Vibration Reduction
Sun, Yu
c0065bc9-12a2-4777-91f2-30238b815d04
Zhou, Jinsong
5302ef52-fd22-4b4d-baa6-3c640dd17f17
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Yuan, Tianchen
de93fa5b-4ded-42af-9c1f-6b67217df22d
Gong, Dao
42222582-fc8e-4704-8369-829c6db7e289
You, Taiwen
9354ab84-f512-4068-ba4a-f0922d8f8387
November 2020
Sun, Yu
c0065bc9-12a2-4777-91f2-30238b815d04
Zhou, Jinsong
5302ef52-fd22-4b4d-baa6-3c640dd17f17
Thompson, David
bca37fd3-d692-4779-b663-5916b01edae5
Yuan, Tianchen
de93fa5b-4ded-42af-9c1f-6b67217df22d
Gong, Dao
42222582-fc8e-4704-8369-829c6db7e289
You, Taiwen
9354ab84-f512-4068-ba4a-f0922d8f8387
Sun, Yu, Zhou, Jinsong, Thompson, David, Yuan, Tianchen, Gong, Dao and You, Taiwen
(2020)
Design, analysis and experimental validation of high static and low dynamic stiffness mounts based on target force curves.
International Journal of Non-Linear Mechanics, 126, [103559].
(doi:10.1016/j.ijnonlinmec.2020.103559).
Abstract
In order to improve vibration isolation, soft components can be used in engineering applications, but this can lead to excessive static deflection. An ideal vibration isolator should have a high static stiffness to ensure that it has sufficient load carrying capacity; at the same time, it should have a low dynamic stiffness to maximize the vibration isolation frequency range. Recently, high static and low dynamic stiffness (HSLDS) mounts have been increasingly shown to have significant benefits for various engineering applications. This paper proposes a method for designing HSLDS mounts based on target force curves. In the design method, the HSLDS mount is obtained by placing a negative stiffness structure in parallel with a positive stiffness linear spring. The negative stiffness structure is achieved by using a roller-slider curve which can be designed according to the requirements to achieve the target force curve. HSLDS mounts are proposed with nth-order stiffness behavior which are designed using the method presented here. The results show that, compared with lower order HSLDS mounts based on the same static stiffness, higher order HSLDS mounts have lower dynamic stiffness near the equilibrium position. The Average Method is used to analyze the dynamics of a system based on the nth-order HSLDS mounts, and the displacement transmissibility under harmonic excitation is obtained. The effects of different parameters on the transmissibility are studied. The results show that appropriately increasing the damping ratio is beneficial for the isolation performance of the HSLDS mount. Finally, an experimental prototype is designed and manufactured. The proposed design method and the vibration isolation performance of the HSLDS mount are verified by constant-frequency excitation experiments.
Text
HSLDS Mounts Based on Target Force Curves FINAL
- Accepted Manuscript
More information
Accepted/In Press date: 17 July 2020
e-pub ahead of print date: 22 July 2020
Published date: November 2020
Additional Information:
Funding Information:
This work is supported by National Natural Science Foundation of China : grant number 51805373 .
Publisher Copyright:
© 2020 Elsevier Ltd
Keywords:
Experimental Verification, High Static and Low Dynamic Stiffness, Nonlinear Transfer Function, Target Force Curve, Vibration Reduction
Identifiers
Local EPrints ID: 442778
URI: http://eprints.soton.ac.uk/id/eprint/442778
ISSN: 0020-7462
PURE UUID: 43e2e6eb-982a-4450-9549-4bd5c929e1b3
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Date deposited: 27 Jul 2020 16:30
Last modified: 17 Mar 2024 05:45
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Contributors
Author:
Yu Sun
Author:
Jinsong Zhou
Author:
Tianchen Yuan
Author:
Dao Gong
Author:
Taiwen You
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