山东电力技术2024，Vol.51Issue(1)：1-10,23,11.DOI:10.20097/j.cnki.issn1007-9904.2024.01.001
海岛大跨越输电塔线体系风振响应及动力失稳分析
Analysis of Wind Vibration Response and Dynamic Instability of Large Crossing Transmission Tower Line System Between Islands
摘要
Abstract
The cross sea transmission tower system has the characteristics of high tower height,large span,high wind speed,and difficult recovery,making it a key weak point in the island power grid,especially severely affected by disasters such as typhoons and strong typhoons.In order to further understand the wind vibration response characteristics of the cross-sea power transmission tower line system and the tower wind destabilization characteristics under the action of strong winds,to a line in Dongtou,Wenzhou,a line of the typical cross-sea section(resistant-straight-straight-resistant)line was taken as the research object.The ABAQUS software was used to establish a finite element analysis model of two towers and three lines in this cross sea section.Firstly,the vibration modes and dynamic parameters of the tower and wire system,the ground wire,the bare tower and the tower system were analyzed.Then,the wind vibration response analysis and displacement wind vibration coefficients of the bare tower and the tower system under the wind angles of 0° and 90° were carried out.Moreover,the incremental dynamics analysis(IDA)was used to simulate the tower wind destabilization characteristics and wind vibration coefficients of the towers under strong winds,taking into account the coupling effect of the ground wire.Finally,IDA was used to simulate the nonlinear collapse process of the tower under strong wind considering the coupling effect of the guide wire.The study shows that there are differences in the influence of the large spanning guide wire on the wind vibration response of the transmission tower under different wind angles.Under 0°wind angle,the large spanning guide wire increases the damping of the system and reduces the wind vibration response,and under 90°wind angle,the large spanning guide wire produces a larger out-of-plane displacement under the action of the transverse wind,which increases the wind vibration response of the tower and wire system.Under strong wind,the diagonal steel of the tower is relatively strong compared to the diagonal steel of the tower,and the displacement and wind vibration coefficient are also different.Under strong winds,the inclined material of the transmission tower is more prone to dynamic instability than the main material,which causes the redistribution of structural internal forces,resulting in the concentration of forces in the middle and upper parts of the tower,and ultimately leading to the gradual collapse of the transmission tower.关键词
大跨越输电塔/塔线耦合/风振响应/风振系数/倒塌特征Key words
long span transmission tower/tower-line coupling/wind-induced response/wind vibration coefficient/collapse characteristics分类
信息技术与安全科学引用本文复制引用
于佳宝,卓越,张佳毅,郑翀,曹枚根..海岛大跨越输电塔线体系风振响应及动力失稳分析[J].山东电力技术,2024,51(1):1-10,23,11.基金项目
国家电网有限公司科技项目(5200-201919121A-0-0-00) （5200-201919121A-0-0-00）
浙江省电力实业总公司科技项目(CF058807002021006).Science and Technology Project of State Grid Corporation of China(5200-201919121A-0-0-00) （CF058807002021006）
Technology Project of Zhejiang Electric Power Industry Corporation(CF058807002021006). （CF058807002021006）
