Original title: Aeroelastic divergence modeled by means of the stochastic resonance
Authors: Náprstek, Jiří ; Pospíšil, Stanislav
Document type: Papers
Conference/Event: Engineering Mechanics 2014 /20./, Svratka (CZ), 2014-05-12 / 2014-05-15
Year: 2014
Language: eng
Abstract: The divergence is one of the most important and dangerous phenomenon of aeroelastic post-critical states occurring at a prismatic slender beam in a cross-flow. This phenomenon manifests by stable periodic hopping between two nearly constant limits perturbed by random noises. Experimental observation and numerical simulation motivates an idea to model this process as the effect of the stochastic resonance. Being observed and practically used in a number of disciplines in physics (optics, plasma physics, atd.) its mathematical basis follows in the most simple case from properties of the Duffing equation with negative linear part of the stiffness. The occurrence of this phenomenon depends on certain combinations of input parameters, which can be determined theoretically and verified experimentally in the wind tunnel.
Keywords: aeroelastic divergence; interwell hopping; non-linear vibration; stochastic resonance
Project no.: GC13-34405J (CEP)
Funding provider: GA ČR
Host item entry: Engineering Mechanics 2014. 20th International conference. May 12-15, 2014, Svratka, Czech Republic. Book of full texts, ISBN 978-80-214-4871-1, ISSN 1805-8248
Note: Související webová stránka: http://www.itam.cas.cz/?pid=5

Institution: Institute of Theoretical and Applied Mechanics AS ČR (web)
Document availability information: Fulltext is available in the digital repository of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0233624

Permalink: http://www.nusl.cz/ntk/nusl-173336


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