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Proceedings Paper

Optimized vibration absorbers for structures with nonproportional damping
Author(s): Ronaldo Carvalho Battista; Carlos Magluta
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Paper Abstract

Harsh environmental conditions and dynamic loads to which many large civil engineering structures are commonly subjected can with time promote serious damages and material deterioration that can undermine serviceability and safety of the structure, its components, and appliances. Reduction of vibrations of these structures caused by new and not previously envisaged dynamic loads can be properly achieved by using a robust passive mechanical control system such as simple tuned vibration absorbers (TVAs) that can be easily inspected and maintained, thus being adequate for severe environment. This paper shows that if TVAs are correctly designed they also are very efficient in reducing vibrations of these structures. By taking into account the non-proportional damping introduced in the multi-degree of freedom structural system by the TVAs, and by using an optimization technique to calculate their optimum parameters, vibrations can be lowered to admissible levels. A practical example of application of light and simple mechanical absorbers to an existing bridge is presented and their performance is demonstrated by experimentally measured dynamic responses.

Paper Details

Date Published: 1 May 1994
PDF: 11 pages
Proc. SPIE 2193, Smart Structures and Materials 1994: Passive Damping, (1 May 1994); doi: 10.1117/12.174096
Show Author Affiliations
Ronaldo Carvalho Battista, Univ. Federal do Rio de Janeiro (Brazil)
Carlos Magluta, Univ. Federal do Rio de Janeiro (Brazil)

Published in SPIE Proceedings Vol. 2193:
Smart Structures and Materials 1994: Passive Damping
Conor D. Johnson, Editor(s)

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