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。
Based on the Panit-an-Nabas power transmission line of the PANAY Island by typhoon＂Yolanda＂,which is 138 kV dual-circuit project in Philippines,simulation transmission line collapsed and the analysis of large-area fracture are shown.In this study,the transmission line is established to three-tower and four-line finite element model in ABAQUS software.The wind-induced progressive collapse of transmission tower-line is simulated by birth-to-death element technique and display integral method.Based on the Kaimal fluctuating wind power spectrum and harmonic superposition method,the wind field is constructed by MATLAB commercial software.Compared with the details of survey,the numerical simulation results demonstrate that this method could describe the transmission tower-line systems collapse performance and path clearly,and can contribute significantly to explain the reason of damage accurately and reasonably in the future.
作者
李士锋
李宏男
张卓群
秦玮
郝鑫
LI Shifeng;LI Hongnan;ZHANG Zhuoqun;QIN Wei;HAO Xin(State Nuclear Electric Power Planning Design ＆ Research Institute Co. ,Ltd, Beijing 100095, China;Faculty of Infrastructure Engineering, Dalian University of Technology, Dalian 116024, China)
出处
《防灾减灾工程学报》
CSCD
北大核心
2017年第5期835-841,共7页
Journal of Disaster Prevention and Mitigation Engineering
基金
国家自然科学基金委创新研究群体基金(51121005)资助
关键词
输电塔-线体系
显式有限单元法
生死单元
倒塌性能
transmission tower-line system
explicit finite element method
birth-to-death element
progressive collapse performance
