Analysis of stochastic resonance phenomenon in wind induced vibration of a girder

0432026 - ÚTAM 2015 RIV CH eng C - Konferenční příspěvek (zahraniční konf.)
Pospíšil, Stanislav - Náprstek, Jiří
Analysis of stochastic resonance phenomenon in wind induced vibration of a girder.
Applied Mechanics and Materials. Vol. 617. Pfaffikon: Trans Tech Publications, 2014 - (Kotrasova, K.; Melcer, J.), s. 285-290. ISBN 978-3-03835-197-9. ISSN 1660-9336.
[International scientific conference on dynamic of civil engineering and transport structures and wind engineering /6./. Donovaly (SK), 25.05.2014-29.05.2014]
Grant CEP: GA ČR(CZ) GC13-34405J
Institucionální podpora: RVO:68378297
Klíčová slova: aeroelastic divergence * nonlinear aero-elasticity * stochastic resonance * turbulence * wind induced vibration * wind tunnel experiments
Kód oboru RIV: JM - Inženýrské stavitelství
http://scientific.stp.net/AMM.617.285

We study the response of a dynamic system to additive random noise and external determin- istic periodic force to investigate vibration of a slender prismatic beam in a cross flow with a turbulence component. The aim of the study is to find such parameter combinations, which should be avoided in practice to eliminate response amplitude increase due to the effect of the stochastic resonance. We assume the non-linear oscillator (beam) with one generalized degree of freedom in the divergence-like regime. It is described by the version of the Duffing equation. We conduct the theoretical investigation with the use of relevant Fokker-Planck equation together with verification by numerical simulation of corresponding stochastic differential system. Real characteristics of a sectional model, fixed in the special stand allowing the snap-through effect, in the wind tunnel are employed.
Trvalý link: http://hdl.handle.net/11104/0236538