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Experimental investigation of targeted energy transfers in strongly and nonlinearly coupled oscillators
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10.1121/1.1944649
/content/asa/journal/jasa/118/2/10.1121/1.1944649
http://aip.metastore.ingenta.com/content/asa/journal/jasa/118/2/10.1121/1.1944649

Figures

Image of FIG. 1.
FIG. 1.

Linear oscillator coupled to a lightweight NES.

Image of FIG. 2.
FIG. 2.

Frequency-energy plot ; unfilled dots represent points of stability exchange.

Image of FIG. 3.
FIG. 3.

Close-up of the .

Image of FIG. 4.
FIG. 4.

Experimental setup. (a) General configuration; (b) experimental impulsive force .

Image of FIG. 5.
FIG. 5.

(a) Schematic of the experimental fixture; (b) mass repartition (grey: primary system; black: NES.

Image of FIG. 6.
FIG. 6.

Measured restoring force represented as a function of (a) time and (b) relative displacement .

Image of FIG. 7.
FIG. 7.

Experimental results for low damping (left column: ; right column: ; note differing durations): (a), (b) measured accelerations; (c), (d) measured displacements; (e), (f) percentage of instantaneous total energy in the NES; (g), (h) displacement of the primary system (NES versus grounded dashpot).

Image of FIG. 8.
FIG. 8.

Experimental results for high damping : (a) measured accelerations; (b) measured displacements; (c) percentage of instantaneous total energy in the NES; (d) measured and simulated energy dissipated in the NES; (e) displacement of the primary system (NES versus grounded dashpot); (f) restoring force.

Image of FIG. 9.
FIG. 9.

Superposition of the wavelet transform of the relative displacement across the nonlinearity and the frequency-energy plot. (a) , low damping; (b) , high damping.

Image of FIG. 10.
FIG. 10.

Case of increased nonlinear coefficient: (a) measured accelerations; (b) measured displacements; a comparison between predicted and measured accelerations: (c) primary system; and (d) NES; (e) motion in the configuration space; (f) percentage of instantaneous total energy in the NES.

Image of FIG. 11.
FIG. 11.

Targeted energy transfer for a mass ratio of 0.04. (a) Displacements; (b) percentage of instantaneous total energy in the NES.

Tables

Generic image for table
TABLE I.

System parameters identified using modal analysis and the restoring force surface method.

Generic image for table
TABLE II.

Nonlinear beating phenomenon: energy transferred to the NES and transfer time.

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/content/asa/journal/jasa/118/2/10.1121/1.1944649
2005-08-01
2014-04-25
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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: Experimental investigation of targeted energy transfers in strongly and nonlinearly coupled oscillators
http://aip.metastore.ingenta.com/content/asa/journal/jasa/118/2/10.1121/1.1944649
10.1121/1.1944649
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