Aeroelastic divergence modeled by means of the stochastic resonance

0428211 - ÚTAM 2015 RIV CZ eng C - Conference Paper (international conference)
Náprstek, Jiří - Pospíšil, Stanislav
Aeroelastic divergence modeled by means of the stochastic resonance.
Engineering Mechanics 2014. 20th International conference. May 12-15, 2014, Svratka, Czech Republic. Book of full texts. Brno: Brno University of Technology. Institute of Solid Mechanics, Mechatronics and Biomechanics, 2014 - (Fuis, V.), s. 420-423. ISBN 978-80-214-4871-1. ISSN 1805-8248.
[Engineering Mechanics 2014 /20./. Svratka (CZ), 12.05.2014-15.05.2014]
R&D Projects: GA ČR(CZ) GC13-34405J
Institutional support: RVO:68378297
Keywords : stochastic resonance * interwell hopping * non-linear vibration * aeroelastic divergence
Subject RIV: JM - Building Engineering
http://www.itam.cas.cz/?pid=5

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.
Permanent Link: http://hdl.handle.net/11104/0233624