Wind-Induced Response Analysis of 1 000 kV Lattice Independent Lightning Protection Tower

  Introduction  This paper is aimed to study the wind-induced response of 1000 kV lattice independent lightning protection tower and propose the reasonable value of wind-induced vibration coefficient.

  Method  The wind-induced response of 1000 kV lattice lightning protection tower was analyzed in this paper with the help of finite element software ANSYS based on the Davenport fluctuating wind speed power spectral density function adopted in the Load Code for Building Structures and the structural random vibration theory and frequency domain analysis method. The wind-induced vibration coefficient was compared with that calculated by the simplified formula recommended in the Standard for Design of High-Rising Structures.

  Result  The analysis results show that the overall deformation of the lightning protection tower meets the specification requirements for the class B landform when the basic wind pressure is not greater than 0.60 kN/m²; The wind vibration coefficient value obtained from the simplified formula recommended in the Standard for Design of High-Rising Structures and the recommended value in the Technical Code for the Design of Substation Buildings and Structures are generally smaller than the value obtained from the finite element analysis, so special attention should be paid to it during structural design.

  Conclusion  According to the comparative analysis results of this paper, it is recommended that the wind-induced vibration coefficient can be uniformly taken as 2.20 during the structural design of 1000 kV lattice independent lightning protection tower.