Maio 2014 vol. 1 num. 1 - 10th World Congress on Computational Mechanics
Full Article - Open Access.
MULTI-OBJECTIVE OPTIMIZATION LINE-UP ALGORITHM APPLIED TO THE DESIGN OF A NONLINEAR VIBRATION ABSORBER
Discrete dynamic vibration absorbers (DVAs) are mechanical devices designed to attenuate the vibration level of different structures and machines. They have been used in several engineering applications, such as ships, power lines, aeronautic structures, civil engineering constructions subjected to seismic induced excitations, among other applications. Traditionally, different approaches based on optimization methods have been proposed to design dynamic vibration absorbers in the mono-objective context. In the present contribution a multi-objective optimization strategy based on the Line-up algorithm is proposed, associated with the Pareto dominance criterion and the crowding distance operator. The test-case analyzed in this work focuses on the theoretical study and numerical simulations of a two degree-of-freedom nonlinear damped system, constituted of a primary mass attached to the ground by a linear spring and the secondary mass attached to the primary system by a nonlinear spring (nDVA). The objectives are both to maximize the attenuation bandwidth and to minimize the amplitude of the system. The results indicate that the proposed approach characterizes an interesting alternative for multi-objective optimization problems as compared with other evolutionary strategies.
Palavras-chave: Discrete dynamic vibration absorbers, multi-objective optimization, Line-up algorithm.,
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Borges, R. A.; Lobato, F. S.; Jr, V. Steffen; "MULTI-OBJECTIVE OPTIMIZATION LINE-UP ALGORITHM APPLIED TO THE DESIGN OF A NONLINEAR VIBRATION ABSORBER", p. 1529-1540 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1].
São Paulo: Blucher,
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-18458
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