Galloping of transmission tower-line system and anti galloping research
CAO Hua-jin 1, 2; LI li 1, 2; JIANG wei 1, 2; CHEN yuan-kun 1, 2
1. School of Civil Engineering & Mechanics， Huazhong University of Science and Technology， Wuhan 430074， China;2. Hubei Key Laboratory of Control Structure， Huazhong University of Science and Technology， Wuhan 430074， China
Abstract： Galloping of overhead transmission conductor which is a low-frequency, high-amplitude self-induced vibration. The transmission tower-cable-insulator model in consideration of coupling effect was established based on ANSYS in this paper. The vertical, horizontal and torsional three directions galloping of the transmission conductors was detailed using the restarting technology and the validity of the restarting technology is verified based on the typical case. Under the condition of different wind velocity, the galloping analysis is performed and the amplitude of the transmissions and the dynamic response of the towers. Different galloping control measures of using inter spacers and multi-point loading were performed. Various layouts projects of the galloping control measures are carried out and the conclusions are got that weighting-added is a good measure for galloping control, multi-point weighting is better than single point weighting, and increment of weight in an appropriate range is conductive to anti-galloping.
2011, Vol. 30 
