变电构架钢管避雷针微风振动研究  

Aeolian Vibration Analysis of Steel-Pole Lightning Rod with Substation Framework

作　　者：叶俊辰 牛华伟[1] 韩军科 陈政清[1] YE Junchen;NIU Huawei;HAN Junke;CHEN Zhengqing(Wind Engineering Research Center,Hunan University,Changsha 410082,China)

机构地区：[1]湖南大学风工程试验研究中心,长沙410082

出　　处：《电瓷避雷器》2021年第2期162-168,共7页Insulators and Surge Arresters

基　　金：国家自然科学基金创新研究群项目(编号:51478181)。

摘　　要：基于对不同变电构架避雷针结构的有限元建模与模态分析,对比其前十阶振动频率、振型等动力特性。利用Ruscheweyh模型结合欧洲规范对典型带支座避雷针和联合构架避雷针进行微风振动计算分析,得到每阶起振临界风速与横风向最大位移,进一步分析构架避雷针横风向涡激共振的特点。该结果对避免构架避雷针在工作频率范围内发生涡激共振及估算其涡激共振下各阶横风向最大位移有实际意义;对于风致振动下构架避雷针的结构设计、日常维护和加固改造有一定的参考意义。Based on the finite element modeling and modal analysis of steel-pole lightning rods with different substation framework,the dynamic characteristics of the first ten order vibration frequencies and modes are compared. The Ruscheweyh model and the European code were used to calculate and analyze the aeolian vibration of steel-pole lightning rods with typical pedestal and combined framework,to obtain the critical wind speed of each order vibration and the maximum displacement of the cross-wind vibration. The characteristics of the cross-wind vortex-induced resonance of the steel-pole lightning rods are further analyzed. The results are of practical significance to avoid vortex-induced vibration of the steel-pole lightning rods with substation framework in the working frequency range and to estimate the maximum cross-wind displacement of each order vortex-induced vibration;of reference significance to the structural design,daily maintenance and reinforcement of steel-pole lightning rods with substation framework under wind-induced vibration.

关 键 词：变电构架 避雷针 模态分析 微风振动 

分 类 号：TM862[电气工程—高电压与绝缘技术]