Shock isolation through passive energy pumping in a system with piecewise linear stiffnesses

Georgiadis, Fotios and Vakakis, Alexander, F. and McFarland, Michael, D. and Bergman, Lawrence (2003) Shock isolation through passive energy pumping in a system with piecewise linear stiffnesses. In: 19th Biennial Conference on Mechanical Vibration and Noise, 2 - 6 September 2003, Chicago, Ill..

Full content URL: http://dx.doi.orh/10.1115/DETC2003/VIB-48490

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Item Type:Conference or Workshop contribution (Paper)
Item Status:Live Archive

Abstract

We investigate shock isolation designs based on nonlinear
energy pumping caused by piecewise stiffness elements. In
particular, we numerically study the shock isolation properties
of a primary linear system of two coupled non-conservative
oscillators with weakly coupled attachments possessing
clearance nonlinearities. Under shock excitation the nonlinear
attachments (termed nonlinear energy sinks – NESs) can be
designed to absorb a significant portion of the input energy,
thus enhancing the shock isolation performance of the primary
system. In contrast to the classical linear vibration absorber
whose operation is restricted to narrowband frequency ranges,
the NESs are capable of efficiently absorbing energies caused
by transient broadband disturbances, a feature that facilitates
their implementation in practical applications. Moreover, the
non-smooth nonlinearities considered in this work are easily
implementable since they are realized by means of linear
stiffness elements.

Additional Information:Proc. ASME. 37033, Volume 5: 19th Biennial Conference on Mechanical Vibration and Noise, Parts A, B, and C 1569
Keywords:shock isolation, Georgiades
Subjects:H Engineering > H310 Dynamics
H Engineering > H342 Vibration
H Engineering > H300 Mechanical Engineering
Divisions:College of Science > School of Engineering
ID Code:9498
Deposited On:30 May 2013 08:55

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