EXPERIMENTAL VERIFICATION OF THE PERFORMANCE OF A NONLINEAR ENERGY SINK

Abstract eng:
The phenomenon of energy pumping, in which vibratory energy is transferred irreversibly within a nonlinear, multi-degree-of-freedom system with the goal of reducing the transient response of the primary substructure, has recently been investigated analytically and through numerical simulations. This paper describes the first efforts to demonstrate energy pumping in the laboratory, using a 2-DOF test rig comprising a linear, SDOF primary system weakly coupled to a nonlinear energy sink (NES). Following a brief review of the parameters of the apparatus, we focus on the simulated and measured responses of the primary and sink subsystems.

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