大跨越输电塔线体系风振控制风洞试验

Wind Tunnel Investigation on Wind-induced Vibration Control of Long Span Transmission Line Systems

以建设中的500 kV江阴大跨越输电塔为工程背景,通过气弹模型风洞试验,对大跨越输电塔线体系风振控制进行了研究。设计了悬挂水箱质量摆、阻尼棒质量摆及二者组合控制等3种控制方案,进行了塔线体系有无控制装置的动力特性测试和紊流场多种风速下风振响应试验。通过模型的阻尼比和风振响应方差分析,验证了振动控制的有效性,为实际工程风振控制设计提供了依据。

This paper mainly investigates the wind-induced vibration control of long span transmission line systems through wind tunnel experiment of aero-elastic model. This experiment is based on the engineering background of 500 kV long span transmission line system under construction in Jiangyin, China. Three kinds of vibration controls, in which suspended water-tank pendulum, viscoelastic damping pendulum and the combination of both are applied to the experiment The dynamic behavior is obtained through free vibration, and wind-induced response of long span transmission line system with or without the control device being tested at various wind speeds under fluctuating wind. The damping ratio and standard deviation of response are calculated and analyzed,and the results prove that these kinds of control are effective. The conclusion of this paper can be used for reference to practical design of wind-induced vibration control of long span transmission towers.