特高压输电线路钢管塔微风振动的防治  

Prevention of Steel Tube UHV Transmission Tower Aeolian Vibration

作　　者：杨靖波[1] 李正[1] 王景朝[1] 

机构地区：[1]国网北京电力建设研究院,北京市100055

出　　处：《电力建设》2008年第9期10-13,共4页Electric Power Construction

基　　金：国家电网公司科技项目(SGSC[2005]124)

摘　　要：输电线路钢管塔的微风振动,是其部分圆截面构件在较低风速时发生的由卡门涡街引起的横风向运动。1000kV特高压同塔双回线路杆塔采用钢管塔方案,其微风振动问题不可忽视,有必要制定切实可行的防治措施。从杆塔结构设计角度,可采取合理确定微风振动起振临界风速、改变构件圆截面形状等预防措施;对运行线路钢管塔,可采取附加扰流装置、缩小构件长细比、增加构件阻尼等治理措施。The steel tube transmission tower aeolian vibration is a crosswind direction motion of some circular members under relatively low wind speed caused by Karman vortex. The aeolian vibration of 1 000 kV UHV double-circuit tower, which adopts steel tube design, should not be overlooked. It is necessary to establish practical preventive measures. From tower structural design standpoint, certain measures, including rationally determining critical wind speed of aeolian vibration, modifying members＇ cross -section shape, etc., can be adopted; for operating towers, preventive measures, including attaching spoiler devices, reducing member slenderness ratio, increasing member damping, etc., can be utilized.

关 键 词：输电线路 钢管塔 微风振动 共振 防治 

分 类 号：TM753[电气工程—电力系统及自动化]