摘要
对一起330 kV设备区架构钢管式避雷针断裂倒塌故障进行详细分析,介绍了故障发生的过程及当时的气象条件。从避雷针的结构入手进行深入剖析。通过对作用于避雷针风荷载进行计算和与设计值进行比对,找到了故障发生的直接原因:处于风场迎风侧最上游的钢管避雷针,在湍流强度较低的流场中和适宜的风速条件下,发生了涡激共振,在涡激共振往复荷载的持续作用下,导致钢管避雷针整体倾倒。
The detail analysis is carried out on a fracture collapsed accident of 330 kV Equipment area architecture lightning rod, the process of failure and the meteorological conditions at that time are introduced. The deep research is carried out starting from the structure of the lightning rod. In the process of calculation of wind load acting on the lightning rod and comparing with the design value, the direct cause of the failure is found. The Vortex-induced resonance is happened for the steel lightning rod in the upstream of the wind field windward in low turbulence intensity of flow field and appropriate wind speed conditions, and under the sustained effect of vortex-induced resonance reciprocating load, the steel lightning rod is whole collapsed.
出处
《电瓷避雷器》
CAS
北大核心
2017年第2期49-52,共4页
Insulators and Surge Arresters
关键词
避雷针
风荷载
风振特性
涡激共振
lightning rod
wind load
wind vibration characteristics
vortex-induced resonance
