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<p>This study investigates the fatigue behavior of AAAC 838 MCM 1120 conductor cables under wind-induced vibrations, a critical factor for the structural integrity of power transmission lines. Experiments were conducted in the Laboratory of Fatigue and Integrity of Conductor Cables at the University of Brasilia, where conductors were subjected to random vibrations with dominant frequencies around 22 Hz and accelerations ranging from 0.25 to 3 g. Strain measurements were used to calculate both theoretical and experimental bending stresses. The results reveal a non-linear relationship between acceleration and bending displacement, highlighting the complex mechanical response of the conductor under dynamic loading. The critical range for fatigue damage is centered around 50–65 MPa. These findings underscore the importance of considering non-linear effects in fatigue assessments and suggest the need for further research into the conductor’s self-damping properties to improve the durability and performance of overhead power lines.</p>

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Experimental analysis of fatigue in AAAC 838 MCM conductors under random vibrations

  • 期刊论文

  • 发表日期：

    2026年3月10日

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  • Paul Edson Vaincoeur,
  • Ricardo Lenon Da Silva Rodrigues,
  • Felipe Maganha de Lima,
  • Remy Kalomboo Badibanga,
  • José Alexander Araújo,
  • Jorge Luiz de Almeida Ferreira

摘要

This study investigates the fatigue behavior of AAAC 838 MCM 1120 conductor cables under wind-induced vibrations, a critical factor for the structural integrity of power transmission lines. Experiments were conducted in the Laboratory of Fatigue and Integrity of Conductor Cables at the University of Brasilia, where conductors were subjected to random vibrations with dominant frequencies around 22 Hz and accelerations ranging from 0.25 to 3 g. Strain measurements were used to calculate both theoretical and experimental bending stresses. The results reveal a non-linear relationship between acceleration and bending displacement, highlighting the complex mechanical response of the conductor under dynamic loading. The critical range for fatigue damage is centered around 50–65 MPa. These findings underscore the importance of considering non-linear effects in fatigue assessments and suggest the need for further research into the conductor’s self-damping properties to improve the durability and performance of overhead power lines.