Ice shedding causes transmission lines to vibrate violently, which induces a sharp increase in the longitudinal unbalanced tension of the lines, even resulting in the progressive collapse of transmission towers in serious cases, which is a common ice-based disaster for transmission tower-line systems. Based on the actual engineering characteristics of a 500 kV transmission line taken as the research object, a finite element model of a two-tower, three-line system is established by commercial ANSYS finite element software. In the modeling process, the uniform mode method is used to introduce the initial defects, and the collapse caused by ice shedding and its influencing parameters are systematically studied. The results show that the higher the ice-shedding height is, the greater the threat of ice shedding to the system; furthermore, the greater the span is, the shorter the insulator length and the greater the dynamic response of the line; the impact of ice shedding should be considered in the design of transmission towers.

中文翻译：

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输电塔线系统滑冰坍塌分析

冰层脱落导致输电线路剧烈振动，导致线路纵向不平衡张力急剧增加，严重时甚至导致输电铁塔连续倒塌，是输电塔线系统常见的冰冻灾害。 . 以某500 kV输电线路的实际工程特点为研究对象，利用商用ANSYS有限元软件建立了二塔三线系统的有限元模型。在建模过程中，采用均匀模态法引入初始缺陷，系统研究了冰脱落引起的坍塌及其影响参数。结果表明，冰脱落高度越高，冰脱落对系统的威胁越大；此外，跨度越大，绝缘子长度越短，线路的动态响应越大；在输电塔的设计中应考虑冰脱落的影响。