Journal
LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES
Volume 16, Issue 4, Pages -Publisher
LATIN AMER J SOLIDS STRUCTURES
DOI: 10.1590/1679-78255285
Keywords
Dynamic vibration absorber; Equal-Peak method; Optimization; Frequency response curve; Bilinear interpolation
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Funding
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico -CNPq
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The present paper proposes a new procedure to determine the optimal parameters of a dynamic vibration absorber (DVA), considering both damped and undamped primary system. The DVA design is formulated as an optimization problem in which the objective function is constructed based on Den Hartog's equal-peak method. The DVA parameters are selected to minimize the response of the primary system when it is subjected to harmonic force or base motion. Firstly, we propose a numerical strategy based on Frequency Response Curve (FRC) in which the parameters of the absorber are updated by minimizing the objective function. The results are presented for a set of reference parameters, which demonstrate the feasibility of the proposed method for determining the optimal parameters of the absorber for both excitations. Taking into account the system response with respect to reference parameters, the bilinear interpolation technique was employed in order to obtain explicit formulas of the damping and frequency ratios of the DVA.
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