Case study of galloping in a low-voltage insulated bundled overhead line

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378297%3A_____%2F24%3A00600488" target="_blank" >RIV/68378297:_____/24:00600488 - 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

Case study of galloping in a low-voltage insulated bundled overhead line

Popis výsledku v původním jazyce

An analysis of the susceptibility of a bundled overhead line to galloping is presented, focusing on a case study of an aerial cable composed of four conductors insulated with polyethylene, used in low-voltage power lines. The susceptibility to instability is analyzed for the cable both with and without simulated icing, as observed on similar real conductors. In the first case, the proneness to galloping was ruled out based on the results of a CFD simulation and the Den Hartog criterion. In the second case, the potential for galloping was confirmed. The critical wind velocity for the ice-covered cable was calculated using quasi-steady theory. Finally, the amplitudes of limit cycle oscillation for supercritical wind speeds were estimated through a simplified numerical analysis. Numerical simulations were also carried out for several different angles of attack—i.e., various rotational angles of the line's cross-section relative to the wind direction—particularly close to the critical angles, to determine and analyze the maximum possible dynamic response.

Název v anglickém jazyce

Case study of galloping in a low-voltage insulated bundled overhead line

Popis výsledku anglicky

An analysis of the susceptibility of a bundled overhead line to galloping is presented, focusing on a case study of an aerial cable composed of four conductors insulated with polyethylene, used in low-voltage power lines. The susceptibility to instability is analyzed for the cable both with and without simulated icing, as observed on similar real conductors. In the first case, the proneness to galloping was ruled out based on the results of a CFD simulation and the Den Hartog criterion. In the second case, the potential for galloping was confirmed. The critical wind velocity for the ice-covered cable was calculated using quasi-steady theory. Finally, the amplitudes of limit cycle oscillation for supercritical wind speeds were estimated through a simplified numerical analysis. Numerical simulations were also carried out for several different angles of attack—i.e., various rotational angles of the line's cross-section relative to the wind direction—particularly close to the critical angles, to determine and analyze the maximum possible dynamic response.

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

40-43

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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