500kV避雷器抗震性能振动台试验研究

通过500 kV避雷器设备的振动台抗震试验,研究标准时程波对避雷器设备抗震性能评估的适用性。抗震试验过程中进行单向输入和双向输入,输入波形包括人工标准时程波、EL Centro地震波、Taft地震波和共振拍波。试验结果表明,在相同地震等级的上述4种地震波的作用下,标准时程波激励下的设备根部应力最大。由于标准时程波对应反应谱卓越频率段较平缓,对于不同设备的试验结果差异相对较小,因此标准时程波适用于500 kV避雷器的抗震性能评估。双向激励与单向激励试验结果对比表明,对于双向轴对称结构进行抗震性能评估时可以仅进行单向激励振动台试验。

Shaking Table Test for Seismic Performance of 500 kV Arrester

This paper studied the application of artificial standard time history wave on the seismic performance evaluation of 500 kV arrester in shaking table test,in which artificial standard time history wave,EL Centro seismic wave,Taft seismic wave,Beat- Wave were inputted unidirectional or bidirectional. The test results show that,under above 4 kinds of seismic waves with the same seismic grade,the stress of the equipment root under the action of artificial standard time history wave is the largest. The difference of test results for the different equipment under the action of artificial standard time history wave should be relatively small because the dominant frequency segment of the response spectrum of time history waves is gentle,so artificial standard time history wave is applied to the seismic performance evaluation of 500 kV arrester. Comparison results under the action of unidirectional or bidirectional waves demonstrate that it can only carry out unidirectional excitation shaking table test for the seismic performance evaluation of two-dimensional axisymmetric structure.