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Aerodynamic Force and Aeroelastic Response Characteristics Analyses for the Galloping of Ice-Covered Four-Split Transmission Lines in Oblique Flows

Author

Listed:
  • Zhaoqing Chen

    (School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin City 132012, China
    Key Lab of Electric Power Infrastructure Safety Assessment and Disaster Prevention of Jilin Province, Northeast Electric Power University, Jilin City 132012, China)

  • Weijie Cai

    (School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin City 132012, China
    Key Lab of Electric Power Infrastructure Safety Assessment and Disaster Prevention of Jilin Province, Northeast Electric Power University, Jilin City 132012, China)

  • Jin Su

    (School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin City 132012, China
    Heilongjiang Electric Power Design Institute Co., Ltd., China Energy Engineering Group, Harbin 150078, China)

  • Bo Nan

    (College of Water Conservancy, Shenyang Agricultural University, 120 Dongling Road, Shenyang 110866, China)

  • Cong Zeng

    (School of Civil Engineering and Architecture, Northeast Electric Power University, Jilin City 132012, China
    Key Lab of Electric Power Infrastructure Safety Assessment and Disaster Prevention of Jilin Province, Northeast Electric Power University, Jilin City 132012, China)

  • Ning Su

    (Tianjin Research Institute for Water Transport Engineering, Ministry of Transport, Tianjin 300456, China)

Abstract

In order to study the galloping mechanism of ice-covered four-split transmission lines in oblique flows, the aerodynamic forces and aero-elastic response characteristics of the crescent-shaped four-split ice-covered transmission lines are investigated through wind tunnel tests on rigid and aero-elastic models. According to Den Hartog and Nigel’s galloping theories, the damping coefficients are calculated based on the experimental data. The results show that the crescent-shaped ice-covered four-split transmission lines usually suffer from torsional galloping. Furthermore, based on the aero-elastic wind tunnel data, the galloping is characterized by an elliptical trajectory, negative damping ratio, and a negative strain at hanging position. In addition, the galloping appears to be more prone to occur under oblique flows, with a larger galloping amplitude and a lower critical wind speed. This might be because an out-of-plane vibration of the third-order mode is excited at a lower wind speed, leading to a coupled resonance between in-plane and out-of-plane vibrations at the third-order mode with a frequency ratio of 1:1. The experimental results in this paper can also be used to verify the fluid-structure interaction simulation method of ice-covered transmission lines.

Suggested Citation

  • Zhaoqing Chen & Weijie Cai & Jin Su & Bo Nan & Cong Zeng & Ning Su, 2022. "Aerodynamic Force and Aeroelastic Response Characteristics Analyses for the Galloping of Ice-Covered Four-Split Transmission Lines in Oblique Flows," Sustainability, MDPI, vol. 14(24), pages 1-24, December.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:24:p:16650-:d:1001341
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    References listed on IDEAS

    as
    1. Peng Liao & Jiyang Fu & Wenyong Ma & Yuan Cai & Yuncheng He, 2021. "Study on the Efficiency and Dynamic Characteristics of an Energy Harvester Based on Flexible Structure Galloping," Energies, MDPI, vol. 14(20), pages 1-19, October.
    2. Lin Ding & Qunfeng Zou & Li Zhang & Haibo Wang, 2018. "Research on Flow-Induced Vibration and Energy Harvesting of Three Circular Cylinders with Roughness Strips in Tandem," Energies, MDPI, vol. 11(11), pages 1-17, November.
    3. Xiaohui Liu & Shuguang Yang & Guangyun Min & Mengqi Cai & Chuan Wu & Yantao Jiang, 2021. "Investigation on the Accuracy of Approximate Solutions Obtained by Perturbation Method for Galloping Equation of Iced Transmission Lines," Mathematical Problems in Engineering, Hindawi, vol. 2021, pages 1-18, March.
    4. Xiaohui Liu & Shuguang Yang & Chuan Wu & Ming Zou & Guangyun Min & Ceshi Sun & Mengqi Cai & Sundarapandian Vaidyanathan, 2021. "Planar Nonlinear Galloping of Iced Transmission Lines under Forced Self-Excitation Conditions," Discrete Dynamics in Nature and Society, Hindawi, vol. 2021, pages 1-20, March.
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