A novel quasi-zero-stiffness strut and its applications in six-degree-of-freedom vibration isolation platform



Zhou, Jiaxi, Xiao, Qingyu, Xu, Daolin, Ouyang, Huajiang ORCID: 0000-0003-0312-0326 and Li, Yingli
(2017) A novel quasi-zero-stiffness strut and its applications in six-degree-of-freedom vibration isolation platform. JOURNAL OF SOUND AND VIBRATION, 394. pp. 59-74.

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Abstract

Generally, existing isolators with quasi-zero stiffness (QZS) are designed for mitigating transmission of vertical translational excitations, but vibration isolation in multiple directions is much more desirable and useful. The major contribution of this paper is extending the QZS vibration isolation method from one degree of freedom (DOF) to all six DOFs, by using a novel QZS strut to construct a 6-DOF QZS vibration isolation platform. Firstly, the design concept of the QZS strut is proposed, and then a pyramidal 3-QZS-strut isolator is assembled. Finally, a 6-DOF QZS platform is achieved by using such isolators as supporting mounts. The equations of motion of this platform are established, and solved by the Harmonic Balance method to obtain amplitude-frequency relationships. Moreover, the performance of vibration isolation is evaluated in terms of force/moment transmissibility. Compared with the linear counterpart, the 6-DOF QZS platform has broader bandwidth of vibration isolation starting from lower frequency, and possesses higher effectiveness in low-frequency range, most importantly, in all six DOFs.

Item Type: Article
Additional Information: publisher: Elsevier articletitle: A novel quasi-zero-stiffness strut and its applications in six-degree-of-freedom vibration isolation platform journaltitle: Journal of Sound and Vibration articlelink: http://dx.doi.org/10.1016/j.jsv.2017.01.021 content_type: article copyright: © 2017 Elsevier Ltd. All rights reserved.
Uncontrolled Keywords: Multi-direction vibration isolation, Negative-stiffness mechanism, Quasi-zero-stiffness strut, Transmissibility
Depositing User: Symplectic Admin
Date Deposited: 28 Mar 2017 09:41
Last Modified: 19 Jan 2023 07:07
DOI: 10.1016/j.jsv.2017.01.021
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3006674