摘要
舞动是输电线高频低幅的自激振动,本文基于ANSYS建立了输电塔-导地线-绝缘串的塔线耦合体系非线性有限元模型,提出了采用重启动技术进行覆冰导线的水平、竖向、扭转三方向舞动分析,并通过经典算例验证了此新方法的可行性;进行了不同风速工况下输电塔-线耦合体系的舞动仿真,得到了体系舞动振幅和输电塔动力响应。同时针对典型工况,进行了相间间隔棒及多点压重防舞措施的舞动控制分析,并对不同布置方案的舞动控制效果进行了比较,确定了有效舞动控制方案。
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.
关键词
输电塔-线体系 /
舞动控制 /
相间间隔棒 /
多点压重
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Key words
transmission tower-line system /
anti galloping /
inter spacers /
multi-point loading
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曹化锦;; 李黎;; 姜维;; 陈元坤;.
输电塔-线体系舞动仿真及控制研究[J]. 振动与冲击, 2011, 30(12): 245-249
CAO Hua-jin;; LI li;; JIANG wei;; CHEN yuan-kun; .
Galloping of transmission tower-line system and anti galloping research[J]. Journal of Vibration and Shock, 2011, 30(12): 245-249
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脚注
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