Publication :


Title:

Variable pitch spring for nonlinear energy sink: application to passive vibration control

Authors: D. Qiu, M. Paredes and S. Seguy
Year: octobre 2018
Journal: Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science.
Volume: Accepté,

Référencé ISI Web Of Science
Référencé Scopus

Abstract:
This paper aims to propose a generalized methodology for designing a novel Nonlinear Energy Sink (NES) with variable pitch springs. To this end, a generic model of the NES system providing the nonlinearity of pure cubic stiffness is introduced. Key features of the model include: (i) specifically sizing two variable pitch springs to provide the force polynomial components with only linear and cubic terms; (ii) pre-compressing two springs at the transition point to produce smooth nonlinear force characteristics; (iii) adding a negative stiffness mechanism to counterbalance the linear term. To generate the variable pitch spring, design parametrization is implemented. The type of shape and the pitch distribution adopted for the spring are shown to fit the objective force-displacement function well. To validate the concept, a special sized NES system is developed. Identification of the force-displacement relation and experiments for the whole system embedded on an electrodynamic shaker are studied. The results show that this NES can not only output the anticipated nonlinearity, but can also produce energy pumping to protect the primary system in a large band of frequencies, thus making it practical for the application of passive vibration control.

Bibtex citation :
@article{Qiu2018,
Author={Qiu, D. and Paredes, M. and Seguy, S.},
Title={Variable pitch spring for nonlinear energy sink: application to passive vibration control},
Journal={Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science},
Month={october},
Volume={Accepté},
Number={},
Pages={},
Year={2018}}


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