Combined random and deterministic effects in a simple aeroelastic model

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F24%3A00597904" target="_blank" >RIV/68378297:_____/24:00597904 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.4203/ccc.9.8.4" target="_blank" >https://doi.org/10.4203/ccc.9.8.4</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.4203/ccc.9.8.4" target="_blank" >10.4203/ccc.9.8.4</a>

Result language
angličtina
Original language name
Combined random and deterministic effects in a simple aeroelastic model
Original language description
The response of slender engineered structures in close proximity to the lock-in frequency region exhibits multiple dominant frequencies that contribute to the quasiperiodic nature of the response. The difference in individual dominant frequencies increases significantly with increasing distance from the lock-in region. This effect alters the character of the response from apparently non-stationary to quasi-periodic, with the frequency of beating varying as the distance from the locking interval changes. In the presence of combined random and harmonic excitation, the response character varies between stationary, cyclo-stationary, and non-stationary, depending on the intensity of the stochastic component. While the probabilistic characteristics of a non-linear Single Degree of Freedom oscillator of the van der Pol type system on a slow time scale can be described using partial amplitudes of the response, this paper specifically focuses on the non-stationary case. The solution to the Fokker-Planck equation for the cross-Probability Density Function of the partial amplitudes is determined using the Galerkin approximation. For this purpose, orthogonal polynomial basis functions are utilized and assessed.
Czech name
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Czech description
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Project
<a href="/en/project/GA24-13061S" target="_blank" >GA24-13061S: The Combined Effects of Aeroelastic Instabilities on Civil Engineering Structures</a><br>
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year
2024
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Article name in the collection
Proceedings of the fifteenth international conference on computational structures technology
ISBN
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ISSN
2753-3239
e-ISSN
2753-3239
Number of pages
13
Pages from-to
8.4
Publisher name
Civil-Comp Press
Place of publication
Edinburgh
Event location
Praha
Event date
Sep 4, 2024
Type of event by nationality
WRD - Celosvětová akce
UT code for WoS article
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