基于SMA阻尼器控制的鼓型塔风振响应分析  

Wind Vibration Responses Analysis of Drum-type Transmission Tower Based on SMA Damper Control

作　　者：孔伟[1] 张春蕊[1] 王晓莹 李成铖[1] 石礁 

机构地区：[1]东北电力大学建筑工程学院,吉林吉林132012 [2]山东电力建设第三工程公司,山东青岛266000 [3]国网舟山供电公司,浙江舟山316000

出　　处：《水电能源科学》2014年第6期153-156,共4页Water Resources and Power

摘　　要：以某220kV输电线路的风致振动为例,研究了基于SMA阻尼器的鼓型塔振动控制方案和控制效果。先应用有限元软件ANSYS建立鼓型塔的有限元模型,采用线性自回归滤波器法模拟随机脉动风荷载的时程样本,再应用能量法计算所需阻尼器数量,根据SMA阻尼器的工作原理和鼓型塔的结构特点,设计了3种阻尼器布置方案进行结构风致振动瞬态响应仿真,提取各方案控制点位移、加速度时间历程进行比较分析。结果表明,安装SMA阻尼器后,对塔顶位移、加速度的最大减振率分别为37.8%、75.4%,方案3为最优布置方案,可见将SMA阻尼器应用于输电塔振动控制效果较好,合理设计阻尼器布置方案能使阻尼器发挥最大耗能功能,获得最好控制效果。Taking wind-induced vibration of 220 kV transmission tower-line system for an example, the vibration reduction strategy and effects are studied based on SMA damper. Firstly, a finite element model of dump-type transmission tower was built by using ANSYS, and the time history samples of random fluctuating wind load was obtained with the linear auto-regressive filter method. The number of dampers was calculated by energy method. Then, three layout schemes of dampers on tower were proposed based on the working principle of SMA damper and the structure of tower. Finally, wind-induced vibration transient response simulations were performed respectively for the different schemes. The influences of SMA dampers on the displacement and acceleration of the controlled nodes were compared. The results show that the SMA damper can reduce the top node displacement by about 37.89% and the acceleration by about 75. 37%; scenario 3 is the optimal installation scheme. It indicates that the SMA damper can suppress the wind-induced vibration, and reasonable scenario enables dampers maximum energy dissipation function and obtains the best control effect.

关 键 词：SMA阻尼器 振动控制 鼓型塔 风振响应 有限元法 

分 类 号：TM8[电气工程—高电压与绝缘技术] TM75