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Experimental analysis of fatigue in AAAC 838 MCM conductors under random vibrations
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DOI：10.1007/s12206-026-0219-8.png)
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Abstract
En 中文
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.
Keywords:
All aluminium alloy conductor
Fatigue damage
Fourier
Power spectral density
Rainflow
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