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OVERHEAD ELECTRICAL CONDUCTORS IN BENDING : NEW TEST DATA

A paper by Kubelwa et al. (Statistical Modelling of Bending Stress in ACSR Overhead Transmission Line Conductors subjected to Aeolian Vibrations –I) reports data from vibration tests on 4 ACSR.  under  3 axial loads (20, 25 and 30% UTS). An 84.5 m conductor span is vibrated at various bending amplitudes and strain is measured near a clamped end (distance not given). Clamps are rigid square-faced bushings. Vibration amplitude is measured at 89 mm from bushing. Strain gages are glued on 3 adjacent top layer wires. Through Hooke’s law, mean stress is derived for each amplitude. Correlation between stress and amplitude is found through 3rd degree polynomial regression. Results are compared with value from Poffenberger-Swart equation. Paper available online at  http://www.iaeng.org/publication/WCE2016/WCE2016_pp23-28.pdf

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