Analysis of Stochastic Resonance Phenomenon in Wind Induced Vibration of a Girder

Abstract:

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.

• Periodical: Applied Mechanics and Materials (Volume 617)
• Pages: 285-290
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.617.285
• Online since: August 2014
• Authors: Stanislav Pospíšil*, Jiří Náprstek
• Keywords: Aeroelastic Divergence, Nonlinear Aero-Elasticity, Stochastic Resonance, Turbulence, Wind Induced Vibration, Wind Tunnel Experiments

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