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

Abstract : This paper aims to propose a generalized methodology for designing a novel nonlinear energy sink with variable pitch springs. To this end, a generic model of the nonlinear energy sink 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 nonlinear energy sink 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 nonlinear energy sink 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.
Type de document :
Article dans une revue
Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, SAGE Publications, 2019, 233 (2), pp.611-622. 〈10.1177/0954406218761485〉
Liste complète des métadonnées

https://hal.insa-toulouse.fr/hal-01940397
Contributeur : Sebastien Seguy <>
Soumis le : mardi 4 décembre 2018 - 22:14:18
Dernière modification le : vendredi 8 février 2019 - 10:06:09

Fichier

19_jme_hal.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Donghai Qiu, Manuel Paredes, Sébastien Seguy. Variable pitch spring for nonlinear energy sink: Application to passive vibration control. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, SAGE Publications, 2019, 233 (2), pp.611-622. 〈10.1177/0954406218761485〉. 〈hal-01940397〉

Partager

Métriques

Consultations de la notice

53

Téléchargements de fichiers

27