强风荷载作用下输电线路的连续倒塌破坏分析

发布时间：2018-01-26 16:59

本文关键词： 输电塔-线体系显式有限单元法生死单元倒塌性能　出处：《防灾减灾工程学报》2017年05期 　论文类型：期刊论文

【摘要】：以菲律宾PANAY岛上138kV双回路Panit-an-Nabas线路为研究对象,模拟台风海燕过境时线路发生连续性倒塔的过程,并探讨了线路发生大面积倒塔的主要原因。基于ABAQUS有限元软件,线路简化为三塔四线有限元模型,并采用显示积分方法和生死单元方法模拟风致作用下输电塔-线体系的倒塔过程和倒塔路径。风荷载选用Kaimal风速谱和谐波叠加法,并应用MATLAB软件模拟生成。通过数值模拟和现场勘测图片对比表明:本文方法不仅能够清晰有效地模拟输电塔-线体系在强风荷载作用下的连续性倒塔机理和破坏路径,而且有助于合理准确地发现和阐明线路倒塔的真正原因。
[Abstract]:Taking the 138kV double-loop Panit-an-Nabas line on PANAY Island in the Philippines as the research object, the process of continuous tower inversion occurred during the transit of Typhoon petrel was simulated. Based on the ABAQUS software, the line is simplified to three towers and four lines finite element model. The display integral method and the birth and death element method are used to simulate the inverted tower process and the inverted tower path of transmission tower-line system under wind-induced action. Kaimal wind speed spectrum and harmonic superposition method are used for wind load. MATLAB software is used to simulate the generation. The comparison between numerical simulation and field survey shows that:. This method can not only clearly and effectively simulate the continuous inverted tower mechanism and failure path of transmission tower-line system under strong wind load. And it is helpful to find and explain the real reason of the inverted tower reasonably and accurately.
【作者单位】：国核电力规划设计研究院有限公司;大连理工大学建设工程学部;
【基金】：国家自然科学基金委创新研究群体基金(51121005)资助
【分类号】：TM75
【正文快照】： 引言输电线路作为高负荷电能的输送载体,是一种应用广泛的重要生命线工程。输电杆塔虽然本身具有高柔特性,但是线路整体是由导地线连接构成的,导致线路自振频率密集,并呈现出多种复杂的振动模态。塔-线耦合体系在风振作用下的动力响应明显,并且非常容易发生构件局部破坏,甚至

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