Modeling aeroelastic phenomena via stochastic resonance in nonlinear bistable oscillators

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F25%3A00638435" target="_blank" >RIV/68378297:_____/25:00638435 - isvavai.cz</a>

Výsledek na webu

<a href="https://doi.org/10.4203/ccc.10.7.1" target="_blank" >https://doi.org/10.4203/ccc.10.7.1</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4203/ccc.10.7.1" target="_blank" >10.4203/ccc.10.7.1</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modeling aeroelastic phenomena via stochastic resonance in nonlinear bistable oscillators

Popis výsledku v původním jazyce

Stochastic resonance is a phenomenon where noise enhances a nonlinear system’s ability to respond to weak periodic excitation. This effect is particularly relevant in bistable systems encountered in post-critical aeroelastic conditions, where purely deterministic models fail to capture observed transitions under unsteady aerodynamic loading. This study explores stochastic resonance in a nonlinear Duffing-type oscillator driven by harmonic forcing and additive white noise, representing a reduced model of a prismatic beam in crossflow, inspired by wind tunnel tests on bridge-like structures. The paper complements a previously developed approximative framework for analysis of the Fokker–Planck equation, which employs a periodic expansion linked with the method of stochastic moments. This approach provides a detailed and structured view of the evolving probability density, offering greater interpretability than standard black-box finite element methods, which are also used for comparison. The results are examined in detail against a FEM benchmark, and potential directions for improving the method—particularly with respect to transient accuracy and numerical stability—are outlined.

Název v anglickém jazyce

Modeling aeroelastic phenomena via stochastic resonance in nonlinear bistable oscillators

Popis výsledku anglicky

Stochastic resonance is a phenomenon where noise enhances a nonlinear system’s ability to respond to weak periodic excitation. This effect is particularly relevant in bistable systems encountered in post-critical aeroelastic conditions, where purely deterministic models fail to capture observed transitions under unsteady aerodynamic loading. This study explores stochastic resonance in a nonlinear Duffing-type oscillator driven by harmonic forcing and additive white noise, representing a reduced model of a prismatic beam in crossflow, inspired by wind tunnel tests on bridge-like structures. The paper complements a previously developed approximative framework for analysis of the Fokker–Planck equation, which employs a periodic expansion linked with the method of stochastic moments. This approach provides a detailed and structured view of the evolving probability density, offering greater interpretability than standard black-box finite element methods, which are also used for comparison. The results are examined in detail against a FEM benchmark, and potential directions for improving the method—particularly with respect to transient accuracy and numerical stability—are outlined.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20101 - Civil engineering

Projekt

<a href="/cs/project/GA24-13061S" target="_blank" >GA24-13061S: Kombinované účinky aeroelastických nestabilit na stavební konstrukce</a><br>

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Proceedings of the eighteenth International conference on civil, structural and environmental engineering computing

ISBN

—

ISSN

2753-3239

e-ISSN

—

Počet stran výsledku

10

Strana od-do

7.1

Název nakladatele

Civil-Comp Press

Místo vydání

Edinburgh

Místo konání akce

Cagliari

Datum konání akce

27. 8. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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