Vibration pumping of mdof structures using optimised multiple dynamic absorbers

K. Khélifi (1) , M.L. Bouazizi (1) , R. Nasri (2) , Noureddine Bouhaddi (3)

1 Institut Préparatoire aux Etudes d'Ingénieurs de Nabeul - IPEIN
2 ENIT - Ecole Nationale d'Ingénieurs de Tunis
3 FEMTO-ST - Franche-Comté Électronique Mécanique, Thermique et Optique - Sciences et Technologies (UMR 6174)

The concept of energy pumping is an innovative dynamic phenomenon; it gives rise to new generation of dynamic absorbers. Theoretical studies and feasibility tests are necessary for better understanding of their dynamic behaviour and to be applied on real structures or machines. In this paper, numerical evidence is firstly given for the passive and broadband targeted energy transfer in the case of a linear system under shock excitation with Multiple Dynamic Absorbers or Nonlinear Energy Sink (NES). Secondly, it is shown that many NES absorb shock energy in only way and dissipate this energy locally, without "spreading" it returns to the linear system. The numerical results of optimisation in the case of NES linked to a linear beam are compared to Tuned Mass Dampers (TMD) linked to the same beam.

Domaines: Mécanique [physics.med-ph]

K. Khélifi, M.L. Bouazizi, R. Nasri, Noureddine Bouhaddi. Vibration pumping of mdof structures using optimised multiple dynamic absorbers. 1st Euro-Mediterranean Conference on Structural Dynamics and Vibroacoustics (MEDYNA 2013), Jan 2013, Tunisia. pp.1 - 4. ⟨hal-00993456⟩