Experimental study of non-linear energy pumping occurring at a single fast frequency

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Targeted energy transfer with parallel nonlinear energy sinks. Part I: Design theory and numerical results (2011, methodology): “McFarland et al. [ 19 ] and Gourdon et al. [20, 21] experimentally verified theoretical effects of energy pumping with a single NES coupled with single and four dof systems, respectively.”
Energy harvesting from vibrations with a nonlinear oscillator (2010, background): “[14] exploit the concept of energy pumping [15] (uni-directional energy transfer) to localize vibrational energy in a nonlinear attachment; also see the review article by Ibrahim [16] and references therein.”
Theoretical and Experimental Study of Multimodal Targeted Energy Transfer in a System of Coupled Oscillators (2006, methodology): “To support the previous theoretical findings, experimental measurements were carried out using the fixture depicted in Fig. 20. It realizes the system described by Equations (15) and is an adaptation of the fixture used in earlier experiments with a 1DOF primary system [ 19 , 20].”