Influence of torsional stiffness on the galloping instability of a low-voltage insulated power line

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F24%3A00600492" target="_blank" >RIV/68378297:_____/24:00600492 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Influence of torsional stiffness on the galloping instability of a low-voltage insulated power line

Popis výsledku v původním jazyce

Our research contribution focuses on a three-dimensional nonlinear numerical study of the galloping phenomenon in a specific bundled overhead power line affected by ice accumulation. We investigated the susceptibility to this self-induced oscillatory behavior at critical wind speeds necessary to initiate the dynamic response in a low-tension cable with simulated icing that parallels observations on analogous real-world conductors. Given the highly nonlinear mechanical properties of such flexible cables, we employed the Newmark integration technique in conjunction with the iterative Newton-Raphson approach. We analyzed two numerical models of the overhead line under wind loading: one assumes linear mechanical behavior under nonlinear wind loading, while the other incorporates full nonlinearity, including geometrical aspects. Our study assessed the impact of torsional stiffness on galloping instability, finding that considering torsional stiffness and the three-dimensional movement of cables under wind can amplify the dynamic response during galloping.

Název v anglickém jazyce

Influence of torsional stiffness on the galloping instability of a low-voltage insulated power line

Popis výsledku anglicky

Our research contribution focuses on a three-dimensional nonlinear numerical study of the galloping phenomenon in a specific bundled overhead power line affected by ice accumulation. We investigated the susceptibility to this self-induced oscillatory behavior at critical wind speeds necessary to initiate the dynamic response in a low-tension cable with simulated icing that parallels observations on analogous real-world conductors. Given the highly nonlinear mechanical properties of such flexible cables, we employed the Newmark integration technique in conjunction with the iterative Newton-Raphson approach. We analyzed two numerical models of the overhead line under wind loading: one assumes linear mechanical behavior under nonlinear wind loading, while the other incorporates full nonlinearity, including geometrical aspects. Our study assessed the impact of torsional stiffness on galloping instability, finding that considering torsional stiffness and the three-dimensional movement of cables under wind can amplify the dynamic response during galloping.

Druh

D - Stať ve sborníku

CEP obor

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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

2024

Kód důvěrnosti údajů

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

Název statě ve sborníku

Computational mechanics 2024. Proceedings of computational mechanics 2024

ISBN

978-80-261-1249-5

ISSN

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e-ISSN

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Počet stran výsledku

4

Strana od-do

79-82

Název nakladatele

University of West Bohemia

Místo vydání

Plzeň

Místo konání akce

Srní

Datum konání akce

4. 11. 2024

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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