山东电力技术2024，Vol.51Issue(1)：11-23,13.DOI:10.20097/j.cnki.issn1007-9904.2024.01.002
±1100kV特高压输电塔线体系风振响应分析
Wind Induced Vibration Response Analysis of±1 100 kV Ultra-high Voltage(UHV)Transmission Tower Line System
摘要
Abstract
To investigate the dynamic response of long cross-arm transmission tower-line system under skewed wind,finite element time history analysis on wind-induced response of a single tower and the tower line system of Zhundong-Huadong±1 100 kV UHV transmission lines was conducted.Firstly,three dimensional fluctuating wind velocity was obtained using the linear filter method,and then fluctuating wind load of a single tower and the tower-line system was calculated combined with quasi steady theory.Secondly,the finite element models of a single tower and tower-line systems were constructed.Dynamic characteristic of tower line system was obtained using modal analysis,and the effects of the grounding wire and the long cross-arm structure on dynamic characteristic were studied.Finally,this paper used the finite element time history analysis approach and studyed the effects of incident angles,the long cross-arm structure and tower line coupling on structural dynamic responses.The results proves that the long cross-arm structure results in the decrease of torsional frequency and moves the occurrence order of torsional model forward.Besides,tower-line coupling reduces the frequency and increase the damping ratio of tower structures.According to the mean displacement calculation results,the most unfavorable wind incident angles are 15°and 75°,respectively;According to the root mean square of torsion angles,the most unfavorable wind direction angle is 0°.In addition,the along wind response of the tower is mainly affected by the background component and the first order vibration mode,while the tower line system is influenced by the low order resonance component of the ground wire additionally,and the torsion angle is mainly influenced by the first order torsional vibration mode.关键词
特高压输电塔线体系/三维风场/时程分析/风振响应Key words
ultra high voltage(UHV)transmission tower-line system/three dimensional(3D)wind field/time history analysis/wind induced response分类
建筑与水利引用本文复制引用
杨子烨,朱超杰,施伟国,邓洪洲..±1100kV特高压输电塔线体系风振响应分析[J].山东电力技术,2024,51(1):11-23,13.基金项目
国家自然科学基金项目(51578421) （51578421）
国网上海市电力公司科技项目(B3090R220005、52090R230007).National Natural Science Foundation of China(51578421) （B3090R220005、52090R230007）
Science and Technology Project of State Grid Shanghai Municipal Electric Power Company(B3090R220005,52090R230007). （B3090R220005,52090R230007）
