Comparative study on the anti-galloping effect of three types of TMDs for iced multi-bundled conductors

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (14) : 36-42.

LOU Wenjuan，LIANG Hongchao，WEN Zuopeng

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Abstract

The equations of bundled conductor attached with either vertical, torsional or vertical-torsional coupled tuned mass damper were established based on the experimental verified 3 DOF conduct equations. Torsional and vertical-torsional coupled tuned mass damper were proposed to prevent galloping, and compared with the vertical tuned mass damper. The galloping wind velocity of conductor-damper system was calculated applying Lyapunov's first stability theorem. The galloping wind velocity was verified by solving the equations applying Newmark-Beta method. The galloping amplitude of an D-shaped 6- bundled conductor section model was calculated at each wind attack angle, and the170 degree wind attack angle which has the largest galloping amplitude, was chosen as the target attack angle and the optimization objective was improving the galloping wind speed of the target attack angle, the parameters of tuned mass dampers were optimized, the effects of the dampers on the galloping wind velocity under the optimal parameters were studied and compared at different wind attack angles. The results show: vertical tuned mass damper decreases the galloping wind speed at the attack angle from 10 to 20 degree; torsional tuned mass damper increases the galloping wind speed to more than 10 m/s at 0 ~40 degree wind attack angle; vertical-torsional coupled tuned mass damper has a better effect on improving the galloping wind speed.

Key words

Galloping / Transmission line / Vertical TMD / Torsional TMD / Vertical-torsional coupled TMD / Vibration control / Multi- bundled conductor;

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LOU Wenjuan，LIANG Hongchao，WEN Zuopeng. Comparative study on the anti-galloping effect of three types of TMDs for iced multi-bundled conductors[J]. Journal of Vibration and Shock, 2020, 39(14): 36-42

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