Numerical analysis of wind-induced stochastic and harmonic excitations on slender structures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F26%3A00643876" target="_blank" >RIV/68378297:_____/26:00643876 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/978-3-032-13225-3_8" target="_blank" >http://dx.doi.org/10.1007/978-3-032-13225-3_8</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/978-3-032-13225-3_8" target="_blank" >10.1007/978-3-032-13225-3_8</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Numerical analysis of wind-induced stochastic and harmonic excitations on slender structures

Popis výsledku v původním jazyce

The response of slender structures exposed to wind flow exhibits various nonlinear behaviors, depending on the ratio between the natural and excitation frequencies. In the lock-in regime, the response becomes stationary, however, due to the nonlinearity of the model, its probability distribution is typically non-Gaussian. Outside the lock-in region, the response takes on a quasi-periodic character, with modulation patterns that depend on the distance from the lock-in boundary. Previous work by the authors demonstrated that averaged stationary response amplitudes can be characterized analytically under exact resonance. For slight detuning, however, numerical methods are required. The Galerkin approach using Hermite basis functions shows limitations, as it may produce nonphysical negative values in the probability density. This paper examines the non-stationary regime beyond lock-in, where the system exhibits quasi-periodic and modulated responses. The proposed methodology provides deeper insight into stochastic dynamics under both resonant and non-resonant conditions and is applicable to a broad range of problems, including traffic-induced vibrations, system identification, and aeroelastic instabilities.

Název v anglickém jazyce

Numerical analysis of wind-induced stochastic and harmonic excitations on slender structures

Popis výsledku anglicky

The response of slender structures exposed to wind flow exhibits various nonlinear behaviors, depending on the ratio between the natural and excitation frequencies. In the lock-in regime, the response becomes stationary, however, due to the nonlinearity of the model, its probability distribution is typically non-Gaussian. Outside the lock-in region, the response takes on a quasi-periodic character, with modulation patterns that depend on the distance from the lock-in boundary. Previous work by the authors demonstrated that averaged stationary response amplitudes can be characterized analytically under exact resonance. For slight detuning, however, numerical methods are required. The Galerkin approach using Hermite basis functions shows limitations, as it may produce nonphysical negative values in the probability density. This paper examines the non-stationary regime beyond lock-in, where the system exhibits quasi-periodic and modulated responses. The proposed methodology provides deeper insight into stochastic dynamics under both resonant and non-resonant conditions and is applicable to a broad range of problems, including traffic-induced vibrations, system identification, and aeroelastic instabilities.

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

2026

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of ICOVP and WMVC 2025. WMVC 2025

ISBN

978-3-032-13224-6

ISSN

—

e-ISSN

—

Počet stran výsledku

10

Strana od-do

71-80

Název nakladatele

Springer

Místo vydání

Cham

Místo konání akce

Lisabon

Datum konání akce

2. 9. 2025

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

—