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Fluidic Composite Tuned Vibration Absorbers

[+] Author Affiliations
Amir Lotfi-Gaskarimahalle, Lloyd H. Scarborough, III, Christopher D. Rahn, Edward C. Smith

The Pennsylvania State University, University Park, PA

Paper No. SMASIS2009-1349, pp. 501-508; 8 pages
doi:10.1115/SMASIS2009-1349
From:
  • ASME 2009 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
  • Volume 1: Active Materials, Mechanics and Behavior; Modeling, Simulation and Control
  • Oxnard, California, USA, September 21–23, 2009
  • Conference Sponsors: Aerospace Division
  • ISBN: 978-0-7918-4896-8 | eISBN: 978-0-7918-3857-0
  • Copyright © 2009 by ASME

abstract

This paper presents a novel Tuned Vibration Absorber (TVA) using Fluidic Flexible Matrix Composites (F2 MC). Fiber reinforcement of the F2 MC tube kinematically links the internal volume with axial strain. Coupling of a fluid-filled F2 MC tube through a fluid port to a pressurized air accumulator can suppress primary mass forced vibration at the tuned absorber frequency. 3-D elasticity model for the tube and a lumped fluid mass develops a 4th -order model of an F2 MC-mass system. The model provides a closed form isolation frequency that depends mainly on the port inertance, orifice flow coefficient, and the tube parameters. A small amount of viscous damping in the orifice increases the isolation bandwidth. With a fully closed orifice, the zero disappears and the system has a single resonant peak. Variations in the primary mass do not change the isolation frequency, making the F2 MC TVA robust to mass variations. Experimental results validate the theoretical predictions in showing a tunable isolation frequency that is insensitive to primary mass variations, and a 94% reduction in forced vibration response relative to the closed-valve case.

Copyright © 2009 by ASME

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