APPLICATION OF FORCE-STATE MAPPING TO A NON-LINEAR FLUID–ELASTIC SYSTEM

The damping mechanisms associated with flow/structure interactions are, in general, considered to be non-linear. In this paper, the fluid–elastic instability of a tube in a heat exchanger is controlled using a tunable damper and the stiffness and damping associated with the flow-induced non-linearit...

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Bibliographic Details
Published in:Mechanical systems and signal processing 2001-01, Vol.15 (1), p.75-85
Main Authors: MESKELL, C., FITZPATRICK, J.A., RICE, H.J.
Format: Article
Language:English
Subjects:
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Physics
Solid mechanics
Structural and continuum mechanics
Vibration, mechanical wave, dynamic stability (aeroelasticity, vibration control...)
Vibrations and mechanical waves
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Summary:The damping mechanisms associated with flow/structure interactions are, in general, considered to be non-linear. In this paper, the fluid–elastic instability of a tube in a heat exchanger is controlled using a tunable damper and the stiffness and damping associated with the flow-induced non-linearities are determined using the force-state mapping technique. The analysis of the results clearly indicates a linear destabilising fluid mechanism but also identifies non-linear damping and stiffness forces which are consistent with both the experimental behaviour and theoretical models for the instability.
ISSN:0888-3270
1096-1216
DOI:10.1006/mssp.2000.1352