输电塔悬挂拉索阻尼器振动控制设计方法及减振效果  

Vibration control design method and vibration reduction effect of suspension cable dampers for transmission tower

作　　者：曹枚根 程义凯 杨德栋 郑翀 钱俊峰 CAO Meigen;CHENG Yikai;YANG Dedong;ZHENG Chong;QIAN Junfeng(School of Civil Engineering,North China University of Technology,Beijing 100144,China;State Grid Wenzhou Power Supply Company,Wenzhou 325000,China)

机构地区：[1]北方工业大学土木工程学院,北京100144 [2]国网温州供电公司,浙江温州325000

出　　处：《振动与冲击》2025年第3期35-44,共10页Journal of Vibration and Shock

基　　金：国网浙江省电力有限公司2024-2025科技项目(SGZJWZ00JSJS2401461)。

摘　　要：输电塔作为受风荷载控制的高耸空间钢结构,强风作用是导致沿海地区输电塔振动破坏,甚至倒塌的重要原因。针对目前输电塔风振控制技术适应性不足的问题,提出了一种悬挂拉索阻尼器的输电塔振动控制技术。分析了悬挂拉索阻尼器中拉索和自复位阻尼器的布置形式,给出了体内拉索及阻尼器布置方式的设计方法。开展了悬挂拉索阻尼器的参数分析,分析了自复位性能和滞回性能,给出了阻尼器质量、刚度、阻尼系数等参数的设计方法。依据参数设计方法中得出的参数,设计了一种非对称自复位阻尼器,并开展了滞回性能试验研究。开展了简化力学模型下的频域分析,得到参数设计的原则:在自复位阻尼器刚度小于拉索刚度的情况下,提高自复位阻尼器的阻尼比,再按照参数设计方法确定其他参数。以温州沿海线路工程中典型猫头塔为研究对象,建立输电塔的有限元模型,通过风振响应分析验证了悬挂拉索阻尼器的振动控制效果,塔顶的加速度响应均方根值下降了13.6%。As high-rise spatial steel structures controlled by wind load,transmission towers in coastal areas are prone to vibration damage and even collapse due to strong winds.Here,aiming at the insufficient adaptability of current wind vibration control technology for transmission towers,a vibration control technology for transmission towers with suspended cable dampers was proposed.Firstly,arrangement of cables and self-centering dampers in suspension cable damper was analyzed,and the design method for arrangement of internal cables and dampers was provided.Parametric analysis for suspension cable damper was performed to analyze its self-centering performance and hysteresis performance,and provide design methods for parameters of damper mass,stiffness and damping coefficient.According to parameters obtained with parametric design methods,an asymmetric self-centering damper was designed and hysteresis performance tests were conducted.Then,frequency domain analysis was performed under a simplified mechanical model to obtain the parametric design principle,it was shown that if self-centering damper stiffness is less than cable stiffness,damping ratio of self-centering damper should be increased and then other parameters are determined according to the parametric design method.Taking the typical cat head transmission tower in Wenzhou coastal transmission line project as the study object,its finite element model was established,and the vibration control effect of suspension cable damper was verified with wind vibration response analysis.The results showed that the RMS value of acceleration response at tower top drops by 13.6%.

关 键 词：输电塔 自复位阻尼器 预应力拉索 风振控制 

分 类 号：TM755[电气工程—电力系统及自动化] TH113.1[机械工程—机械设计及理论]