Zhejiang dianli (Jul 2022)

Analysis of the influence of glued flange joint damage on dynamic properties of composite insulator

  • DI Yuelun,
  • CAO Meigen,
  • ZHOU Shuchen,
  • ZHANG Ruoyu

DOI
https://doi.org/10.19585/j.zjdl.202207009
Journal volume & issue
Vol. 41, no. 7
pp. 63 – 69

Abstract

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In order to explore the relationship between glued flange joint damage and the change of dynamic characteristics of composite insulator bushing, the paper takes a ± 800 kV composite insulator as the research object and establishes the finite element model of insulator. Moreover, it presets the damage influence factors in colloid height and angle direction and calculates the dynamic characteristics of composite insulators before and after damage. The results show that the crack and deformation of the adhesive layer interface at the flange joints of composite insulators may reduce the overall structural stiffness. The decrease of the flange joint’s bending stiffness is linear with the flange’s cracking area in colloid height and angle direction. The decreased cracking area of the colloid in the height direction of the flange angle is also approximately linear with the reduced bending stiffness area of the flange joint. The colloid damage in the vibration direction has the most significant impact on the flange stiffness.

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