A robust equal-peak method for uncertain mechanical systems

Equal-peak method; Scenario approach; Uncertain mechanical system; Vibration absorber; Electric drives; Mechanics; Environmental variability; Linear vibrations; Mechanical systems; Numerical investigations; Vibration mitigation; Vibrations (mechanical)

Abstract :

[en] The linear vibration absorber is a widely-used vibration mitigation device. However, when the absorber is tuned according to Den Hartog's equal-peak method, the resulting narrow bandwidth may decrease its effectiveness, especially when the host structure is uncertain or in the presence of environmental variability. In this paper, a new tuning strategy of the linear absorber, based on the concept of robust equal peaks, is introduced for mitigating a specific resonance of an uncertain mechanical system. Both analytical and numerical investigations are carried out to demonstrate the robustness of the proposed absorber. For 20% uncertainty in the stiffness of the host system, the performance improvement brought by the robust equal-peak method amounts to more than 30% with respect to Den Hartog's tuning rule. © 2017 Elsevier Ltd

Disciplines :

Mechanical engineering

Author, co-author :

Dell'Elce, Lamberto ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Gourc, E.; Space Structures and Systems Laboratory, Department of Aerospace and Mechanical Engineering, University of Liege, Liege, Belgium

Kerschen, Gaëtan ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Laboratoire de structures et systèmes spatiaux

Language :

English

Title :

A robust equal-peak method for uncertain mechanical systems

Publication date :

2018

Journal title :

Journal of Sound and Vibration

ISSN :

0022-460X

eISSN :

1095-8568

Publisher :

Academic Press

Volume :

414

Pages :

97-109

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

CNES - Centre National d'Études Spatiales
F.R.S.-FNRS - Fonds de la Recherche Scientifique
ULiège - Université de Liège
Marie Curie Cancer Care

Available on ORBi :

since 21 May 2020

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