摘要
由于输电线路的风致振动可降低输电杆/塔、导线和金具连接件的疲劳强度,严重时可导致倒杆/塔、断线等事故,对基于阻尼耗能原理的风振抑制措施进行研究。首先,采用有限元分析软件ANSYS,分析输电塔线体系的风致振动响应;然后,提出基于阻尼器耗能原理的输电塔振动抑制策略,根据杆塔的结构特点,设计并比较分析多种阻尼器布置方案对风振的抑制效果。最后,在广东省某线路上实施该方案,在2012-08"启德"台风登陆期间,在9-10级台风(风速21-24 m/s)时,监测到输电塔的振动加速度。研究结果表明:将阻尼器布置在塔身中上部主材上可以更有效地消耗风振能量,控制风振幅值;采用该方案测得"启德"台风登陆期间输电塔的振动加速度下降60%-70%,为输电线路防强风灾害防治、提高线路容灾能力提供了一种有效方法。
Because the wind-induced vibration of transmission tower may reduce the fatigue strength of the transmission rod/tower, wire and hardware connections, and in severe cases can lead to tower or rod fall, the wind-induced vibration reduction was researched based on energy dissipation principle of damper. Firstly, the wind-induced vibration response of transmission tower-line system was analyzed with ANSYS software. Secondly, the vibration reduction strategy of transmission tower was put forward based on energy dissipation principle of damper. The effect of wind-induced vibration reduction with different damper layouts was designed and compared. At last, the program mentioned was implemented into transmission tower in Guangdong Province during the typhoon ＂Kai Tak＂ in August 2012. The results show that the wind-induced vibration energy can be dissipated effectively, as well as the amplitude of wind-induced vibration. During the typhoon ＂Kai Tak＂ in August 2012, the vibration acceleration of transmission tower is decreased by 60%-70% during 9-10 typhoon （speed at 21-24 m/s）, which shows that it is an effective way to prevent strong winds disaster and improves the disaster prevention capacity.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第1期397-402,共6页
Journal of Central South University:Science and Technology
基金
中国南方电网责任有限公司2011年科技计划项目(K-GD2011-392)
关键词
输电塔线体系
风致振动
黏弹性阻尼器
ANSYS软件
transmission tower line system
wind-induced vibration
viscoelastic damper
ANSYS software
