Spectral Element Analysis
of Non-stationary Wind Acting
on Overhead Transmission Line
Maciej Dutkiewicz and Marcela R. Machado
Abstract In the paper, the issue of vibrations of the transmission line under the
impact of non-stationary wind is analysed. Analysis is performed for the ACSR highvoltage transmission line with the span of 213.0 m. Analysis is made for natural and
wind excited vibrations. The numerical model is prepared using the spectral element
method.
1 Introduction
Non-stationary wind action on structures has the short and transient characteristics
so it is difficult to use direct correlation and spectral analysis.
Overhead transmission lines are constantly subjected to variable wind loads which
may gradually lead to the impairment of their durability, resulting in the shortened
service life.
This is very important to develop the easy and fast methodology for design, taking
into consideration all loads and uncertainties acting on the overhead transmission
lines. Nowadays, we see the wide development of new materials and solutions to
raise the conductivity; but at the same time, we observe that conductors’ durability
is changed and required the permanent update analysis. Spectral element method
seems to be such fast and easy tool which fulfils these requirements.
Many researchers investigate the vibrations of the overhead transmission lines
[1–5]. The following cable vibrations occur: aeolian vibrations, galloping and wakeinduced vibrations [6–9].
In most cases, galloping is caused by sustained wind of an average and high
speed (V > 15 m/s), blowing on an asymmetrically loaded (e.g. with ice or wet snow)
M. Dutkiewicz (B)
Faculty of Civil, Architecture and Environmental Engineering and Architecture, University of
Science and Technology in Bydgoszcz, Al. Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland
e-mail: macdut@utp.edu.pl
M. R. Machado
Department of Mechanical Engineering, University of Brasilia, Brasilia 70910-900, Brazil
© Springer Nature Switzerland AG 2021
N. Herisanu and V. Marinca (eds.), Acoustics and Vibration of Mechanical
Structures—AVMS 2019, Springer Proceedings in Physics 251,
https://doi.org/10.1007/978-3-030-54136-1_47
463
of Non-stationary Wind Acting
on Overhead Transmission Line
Maciej Dutkiewicz and Marcela R. Machado
Abstract In the paper, the issue of vibrations of the transmission line under the
impact of non-stationary wind is analysed. Analysis is performed for the ACSR highvoltage transmission line with the span of 213.0 m. Analysis is made for natural and
wind excited vibrations. The numerical model is prepared using the spectral element
method.
1 Introduction
Non-stationary wind action on structures has the short and transient characteristics
so it is difficult to use direct correlation and spectral analysis.
Overhead transmission lines are constantly subjected to variable wind loads which
may gradually lead to the impairment of their durability, resulting in the shortened
service life.
This is very important to develop the easy and fast methodology for design, taking
into consideration all loads and uncertainties acting on the overhead transmission
lines. Nowadays, we see the wide development of new materials and solutions to
raise the conductivity; but at the same time, we observe that conductors’ durability
is changed and required the permanent update analysis. Spectral element method
seems to be such fast and easy tool which fulfils these requirements.
Many researchers investigate the vibrations of the overhead transmission lines
[1–5]. The following cable vibrations occur: aeolian vibrations, galloping and wakeinduced vibrations [6–9].
In most cases, galloping is caused by sustained wind of an average and high
speed (V > 15 m/s), blowing on an asymmetrically loaded (e.g. with ice or wet snow)
M. Dutkiewicz (B)
Faculty of Civil, Architecture and Environmental Engineering and Architecture, University of
Science and Technology in Bydgoszcz, Al. Prof. S. Kaliskiego 7, 85-796 Bydgoszcz, Poland
e-mail: macdut@utp.edu.pl
M. R. Machado
Department of Mechanical Engineering, University of Brasilia, Brasilia 70910-900, Brazil
© Springer Nature Switzerland AG 2021
N. Herisanu and V. Marinca (eds.), Acoustics and Vibration of Mechanical
Structures—AVMS 2019, Springer Proceedings in Physics 251,
https://doi.org/10.1007/978-3-030-54136-1_47
463