This paper investigates the physical behaviour andeffectiveness of a nonlinear dynamic vibration absorber(NDVA). The nonlinear absorber considered involves anonlinear hardening spring which was designed andattached to a cantilever beam excited by a shaker. Thecantilever beam can be considered at low frequencies as alinear single degree-of-freedom system. The nonlinearattachment is designed to behave as a hardening Duffingoscillator. The nonlinearity of the attachment is due to theparticular geometrical configuration undergoing a largeamplitude response. The experiment investigated thepotential for vibration reduction of the system. Analyticaland numerical results are presented and compared. Fromthe measured results it was observed that the NDVA had amuch wider effective bandwidth compared to a linearabsorber. The frequency response curve of the NDVA hasthe effect of moving the second resonant peak to a higherfrequency away from the tuned frequency so that thedevice is robust to mistuning.
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