不同覆冰形式的导线脱冰动力响应研究

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摘要为了研究覆冰形式和脱冰方式对导线脱冰动力响应的影响，建立了档距和高差分别为800 m、50 m的有限元模型，分析导线在均匀覆冰、三段覆冰和线性覆冰三种覆冰形式下发生均匀脱冰和非均匀脱冰时的动力响应规律，探讨档距、覆冰厚度、脱冰率等因素对导线最大冰跳高度的影响。结果表明：脱冰工况相同时，线性覆冰较均匀覆冰形式下的脱冰动力响应更加剧烈；脱冰率为50%时导线覆冰脱落后的峰值张力均小于覆冰时的最大静态张力；最大冰跳高度在不同工况下的变化规律与覆冰形式密切相关。研究结果为覆冰区输电线路设计提供了参考依据。

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	王金锁
	刘美瑶
	岳华刚
	马忠龙
	周文武
	江岳
	孙清

关键词 ：输电线路, 有限元分析, 覆冰形式, 脱冰, 动力响应

Abstract：The influence of the ice-coating form and the type of ice-shedding on the dynamic response of iced conductors for overhead lines were investigated in this work.Finite element models of iced conductors with the span of 800 m and the height difference of 50 m were established to analyze the dynamic response law of the uniform and the non-uniform ice-shedding under uniform ice-coating, three-stage ice-coating and linear ice-coating.Meanwhile, the effects of span, ice thickness and ice-shedding rate on the maximum ice jump height of conductors were discussed.The results show that the dynamic response of the linear ice-coating is more severe than that of the uniform ice-coating when the ice-shedding conditions are the same; the peak tension of the conductors after ice-coating is less than the maximum static tension when the ice-shedding rate is 50%; the change law of the maximum ice jump height is closely related to the ice-coating form.The research outcomes of this paper may provide a reference for the design of transmission lines in ice coverage areas.

Key words： transmission line finite element method ice-covered form ice-shedding dynamic response

收稿日期: 2020-05-13 出版日期: 2021-10-28

引用本文:

王金锁，刘美瑶，岳华刚，马忠龙，周文武，江岳，孙清. 不同覆冰形式的导线脱冰动力响应研究[J]. 振动与冲击, 2021, 40(20): 193-199.
WANG Jinsuo,LIU Meiyao,YUE Huagang,MA Zhonglong,ZHOU Wenwu,JIANG Yue,SUN Qing. A study of dynamic response characteristic of ice-shedding on conductors for overhead lines under different ice-coating types. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(20): 193-199.

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http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I20/193

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