Structural Engineering and Mechanics

  • 제75권4호
  • /
  • Pages.465-475
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  • 2020
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  • 1225-4568(pISSN)
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  • 1598-6217(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

The nonlinear galloping of iced transmission conductor under uniform and turbulence wind

  • Liu, Zhonghua (School of Architecture and Civil Engineering, Xiamen University) ;
  • Ding, Chenhui (School of Architecture and Civil Engineering, Xiamen University) ;
  • Qin, Jian (School of Architecture and Civil Engineering, Xiamen University) ;
  • Lei, Ying (School of Architecture and Civil Engineering, Xiamen University)
  • 투고 : 2019.12.12
  • 심사 : 2020.02.20
  • 발행 : 2020.08.25
⟨ 이전 논문 다음 논문 ⟩

초록

The analytical approach for stability and response of iced conductor under uniform wind or turbulent wind is presented in this study. A nonlinear dynamic model is established to describe the motion of iced conductor galloping. In the case of uniform wind, the stability condition is derived by analyzing the eigenvalue associated with linearized matrix; The first order and second order approximation of galloping amplitude are obtained using multi-scale method. However, real wind has random characteristics essentially. To accurately evaluate the performance of the galloping iced conductor, turbulence wind should be described by random processes. In the case of turbulence wind, the Lyapunov exponent is conducted to judge the stability condition; The probability density of displacement is obtained by using the path integral method to predict galloping amplitude. An example is proposed to verify the effectiveness of the previous methods. It is shown that the fluctuating component of wind has little influence on the stability of iced conductor, but it can increase galloping amplitude. The analytical results on stability and response are also verified by numerical time stepping method.

키워드

과제정보

The research described in this paper was financially supported by National Key R&D Program of China (Grant No. 2017YFC0803300) and the National Natural Science Foundation of China (Grant No. 11772277).

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피인용 문헌

  1. Theoretical Analysis and Experimental Validation on Galloping of Iced Transmission Lines in a Moderating Airflow vol.2021, 2020, https://doi.org/10.1155/2021/9969435