Targeted energy transfer in a 2-DOF mechanical system coupled to a non-linear energy sink with varying stiffness

The dynamical behavior of a non-linear mechanical system with two degrees of freedom (DOFs) during free and forced excitations is studied analytically and numerically. The non-linearity of the system is represented intentionally by a smooth non-linear simple function with periodically varying stiffn...

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Bibliographic Details
Published in:Journal of vibration and control 2017-09, Vol.23 (16), p.2567-2577
Main Authors: Lamarque, Claude-Henri, Thouverez, F, Rozier, B, Dimitrijevic, Z
Format: Article
Language:English
Subjects:
Degrees of freedom
Energy transfer
Linearity
Nonlinearity
Stiffness
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Summary:The dynamical behavior of a non-linear mechanical system with two degrees of freedom (DOFs) during free and forced excitations is studied analytically and numerically. The non-linearity of the system is represented intentionally by a smooth non-linear simple function with periodically varying stiffness around a constant value for the sake of practical investigations. Analysis of the system leads to a method that could be used to design the non-linear energy sink (NES) so that the behavior of the system during relaxation and its strongly modulated response (SMR) could be improved versus the constant stiffness configuration.
ISSN:1077-5463
1741-2986
DOI:10.1177/1077546315618540