420kV避雷器振动台抗震试验

Shaking Test for Anti-seismic Performance of a 420 kV Surge Arrester

通过对420 k V避雷器设备进行模拟振动台抗震试验,对其抗震性能提出评价。首先利用白噪声激励扫频得到实际设备的自振频率,进而分析结构的动力特性,同时对设备分别输入EL Centro波、汶川波和人工波,测定模型在不同地震作用下关键部位加速度、应变等主要参数,考核设备的抗震性能以及支架与上部设备的连接受力性能。试验结果表明,在不同的地震波作用下,输入不同地震波加速度峰值时,420 k V避雷器设备无结构损伤,具有一定的抗震能力,为后期评定避雷器设备的抗震性能提供一定的理论参考。

A simulation of the anti- seismic experiment of a 420 kV surge arrester was done, and its anti- shaking performance was evaluated. First of all, the natural vibration frequencies of a real device were obtained by using white noise excitation frequency scanning, and the dynamic characteristics of the structure was analyzed. Then, the EL Centro wave, Wenchuan earthquake wave and artificial wave were input to the device respectively. The acceleration, strain and some other main parameters at some key positions of the device were measured. The anti-seismic performance of the device, strength of the connection between the support and the upper device were tested. The experimental results show that the action of different seismic wave and different input peak acceleration cause no structural damage for the 420 kV surge arrester device. So, this device has some anti-seismic ability. This work provide some theoretical reference to assess the anti-seismic behavior of the arrester equipment.