Aero-elastic testing of multi-spanned transmission line subjected to downbursts

作者：Elawady Amal; Aboshosha Haitham; El Damatty Ashraf^*; Bitsuamlak Girma; Hangan Horia; Elatar Ahmed

来源：Journal of Wind Engineering and Industrial Aerodynamics, 2017, 169: 194-216.

DOI：10.1016/j.jweia.2017.07.010

• Aero-elastic modeling
• Downburst
• Microburst
• Transmission line
• Cable
• Wind load
• High-intensity wind
• WindEEE
• Resonance

This paper reports the first aero-elastic test conducted under a scaled downburst wind field at the WindEEE dome facility at the University of Western Ontario, Canada. The main purpose of the test is to assess the dynamic response of a multi-span transmission line. The study starts by providing a characterization of the downburst wind field produced in WindEEE including a comparison with results of previously conducted numerical simulations. A number of test configurations, involving different locations of the downburst relative to the line, is considered. A decomposition approach is developed to separate between the resonant and the background components of the response. The results are presented in the form of a dynamic magnification factor that relates the peak response including the dynamic effect to the maximum quasi-static response. The test results show that the resonance contribution ranges between 5% and 10% of the peak response for the tower. They also show that the dynamic response of the conductors can reach up to 30% and 12% of the peak response,at low and high downburst speeds, respectively.

• 出版日期2017-10