电力勘测设计Issue(1)：30-37,8.DOI:10.13500/j.dlkcsj.issn1671-9913.2025.01.007
不同激励方式下输电塔模态参数识别研究
Research on Dynamic Characteristic Parameter Identification of Transmission Tower Under Different Excitations
摘要
Abstract
Wind load is the main control load of transmission tower,and the value of damping ratio directly affects the design value of wind load of transmission tower,the damping ratio of transmission tower is of great significance for wind resistant design of transmission lines.According to GB 5009-2012,the standard 0.01 of steel structure is generally used for the damping ratio of transmission towers.To accurately study the dynamic parameters of the transmission tower,two 110 kV transmission towers with the same structure,transmission tower and tower-line system,are tested to get the excitation response and dynamic parameters precisely.The vibration signals are obtained by using 4 different excitation methods,modified periodogram algorithm is used to denoise the response signals,half-power bandwidth method is applied to identify the dynamic parameters of response signals.The finding indicated that the ambient excitation can meet the requirements of the identification accuracy of damping ratio.Under the condition of slight vibration,whether suspend wire or not has almost no influence on the value of the damping ratio along the cross arm direction,and the value of the damping ratio of the tower-line system along the conductor direction is 20%less than that of the single tower.关键词
输电塔/塔-线体系/激振方法/加速度响应/阻尼比Key words
transmission tower/tower-line/excitation method/acceleration response/damping ratio分类
信息技术与安全科学引用本文复制引用
杨磊,吕宝华,王征,黄利平..不同激励方式下输电塔模态参数识别研究[J].电力勘测设计,2025,(1):30-37,8.基金项目
中国电力工程顾问集团有限公司科技项目(DG1-T02-2018) （DG1-T02-2018）
国家自然科学基金(51978570). （51978570）
