Parametric Study on Energy Pumping of Mdof System Using Multiple Dynamic Absorbers

Abstract

The concept of energy pumping is an innovative dynamic phenomenon. This phenomenon gives rise to a new generation of dynamic absorbers. Theoretical studies and feasibility tests are necessary for a better understanding of their dynamic behaviour and for them 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 (Machine for example) under shock excitation with Multiple Dynamic Absorbers (MDA). Secondly, it is shown that many MDA absorb shock energy in a one way irreversible fashion and dissipate this energy locally, without "spreading" it back to the linear system. Finally, numerical results in the case of MDA linked to a linear beam are compared to Tuned Mass Dampers (TMD absorbers) linked to the same linear beam.