Shock isolation through passive energy pumping caused by nonsmooth nonlinearities

Georgiadis, Fotios, Vakakis, Alexander, F., McFarland, Michael, D. and Bergman, Lawrence (2005) Shock isolation through passive energy pumping caused by nonsmooth nonlinearities. International Journal of Bifurcation and Chaos, 15 (6). pp. 1989-2001. ISSN 0218-1274

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We investigate shock isolation designs based on nonlinear energy pumping caused by nonsmooth stiffness elements. In particular, we numerically study the shock isolation properties of a primary linear system of two coupled nonconservative 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 nonsmooth nonlinearities considered in this work are easily implementable since they are realized by means of linear stiffness elements.

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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:9530
Deposited On:18 May 2013 21:12

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