Galloping of insulated bundled overhead line simplified analysis

0585979 - ÚTAM 2025 RIV CZ eng C - Konferenční příspěvek (zahraniční konf.)
Hračov, Stanislav - Macháček, Michael
Galloping of insulated bundled overhead line simplified analysis.
Engineering mechanics 2024. Book of full texts. Brno: Brno University of Technology, 2024 - (Fuis, V.; Hájek, P.), s. 126-129. ISBN 978-80-214-6235-9. ISSN 1805-8248.
[Engineering mechanics 2024 /30./. Milovy (CZ), 14.05.2024-16.05.2024]
Grant CEP: GA ČR(CZ) GA24-13061S
Institucionální podpora: RVO:68378297
Klíčová slova: aerial bundled cable * wind effects * galloping * limit cycle oscillation
Obor OECD: Civil engineering

Our paper provides an analysis of the susceptibility of a particular bundled overhead line to galloping. It presents a case study of an aerial bundled cable, consisting of four conductors insulated by polyethylene, and used for low-voltage power lines. The susceptibility to loss of stability is analyzed for cable without and with simulated icing observed on similar real conductors. In the first case, the proneness to galloping was excluded based on the results of CFD simulation and the Den Hartog criterion. In latter case, the possible occurrence of galloping was confirmed. The critical wind velocity for the ice-covered cable was calculated utilizing quasi-steady theory. Finally, the amplitudes of limit cycle oscillation for supercritical wind speeds were estimated based on simplified numerical analysis.
Trvalý link: https://hdl.handle.net/11104/0353605