东南大学学报（英文版）2025，Vol.41Issue(2)：180-189,10.DOI:10.3969/j.issn.1003-7985.2025.02.007
螺栓节点松动对角钢输电塔动力特性影响规律研究
Effects of bolt joint loosening on the dynamic characteristics of electric angle steel transmission tower
摘要
Abstract
Transmission towers,serving as the support struc-ture of transmission lines,are significant for the functional-ity of an electric transmission system.Bolt joint loosening is one of the critical factors that can affect the safety and sta-bility of transmission towers.In this study,the effects of bolt joint loosening on the dynamic characteristics of a 220-kV angle steel transmission tower are the main topic of concern.First,the mechanical properties of typical joints subjected to different degrees of bolt loosening are studied by finite solid-element simulation,based on which a finite hybrid-element modeling method is developed for a tower structure suffering varying loose degrees in the joints.Tak-ing a 220-kV angle steel transmission tower as the object,the influence of the position and degree of loosening on the tower's natural frequencies and mode shapes are simulated and discussed.The results demonstrate that the main-member splice joint and the main diagonal-horizontal member gusset plate joint account for the dominant impact on the dynamic characteristics of the tower.In addition,the dominant joint shifts from the main-member splice joint to the main diagonal-horizontal member gusset plate joint as the considered modal order increases.In the case of double joints loosening simultaneously,the loosening of nondomi-nant joints has nonnegligible effects on the tower as well.关键词
输电塔/螺栓节点/节点松动/动力特性Key words
transmission tower/bolt joint/bolt loosening/dynamic characteristics分类
动力与电气工程引用本文复制引用
蔡云竹,邢宇杰,谢强,程小武..螺栓节点松动对角钢输电塔动力特性影响规律研究[J].东南大学学报（英文版）,2025,41(2):180-189,10.基金项目
The Youth Foundation Project of Jiangsu Province(No.BK20230337),the Natural Science Research of Jiangsu Higher Education Institutions of China(No.22KJB560004),the National Natu-ral Science Foundation of China(No.52278523). （No.BK20230337）
