Vibration Amplitudes and Tensions of Conductors during Galloping in Transmission Tower-Line System

doi:10.11930/j.issn.1004-9649.2014.10.71.5

Abstract

Abstract: The finite element models of three typical transmission tower-line systems are set up by means of ABAQUS software, and the galloping processes are numerically simulated, based on which the vibration amplitudes and tensions of the conductors in different span and different phase during galloping are obtained. Based on the comparison of the numerical results with those determined by the theoretical simplified and empirical formulas, it is found that the simplified formula presented by Hunt and Richards is suitable for galloping amplitude estimation of dead-end span; the empirical formula presented by Lilien and Havard is suitable for galloping amplitude estimation of suspension span, and the simplified formula by Baenziger is suitable for dynamic tension estimation of conductors in both dead-end and suspension spans. Moreover, the stresses in the dead-end towers are larger than those in the suspension towers. The max stresses in the conductors and dead-end towers exceed the allowable stress of materials under some wind speed, which may cause the rupture of conductors and damage of towers.

Key words: transmission tower-line system, galloping amplitude, dynamic tension, numerical simulation, tension, conductor galloping, tower

CLC Number:

TM753

ZAO Li, YAN Bo, LÜ Xin, LIANG Ming. Vibration Amplitudes and Tensions of Conductors during Galloping in Transmission Tower-Line System[J]. Electric Power, 2014, 47(10): 71-76.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2014.10.71.5

https://www.electricpower.com.cn/EN/Y2014/V47/I10/71

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