地下变电站结构振动与噪声特性分析

以220 kV朝阳门地下变电站及其耦连建筑作为测试研究对象，分别开展了地下变电站变压器室及各楼层混凝土楼板、墙体的振动与噪声测试，并对测试数据的时域与频谱进行了分析。结果显示：（1）变压器油箱壁的振动幅值较大，变压器油箱的振动频谱主要为100 Hz及其谐振频率，且变压器室内基础、楼板及墙体振动的频谱特性与油箱基本一致；（2）变压器的振动与噪声通过固体传播扩散到整个地下变电站和建筑结构中，设计时不可忽略结构振动与噪声的影响；（3）随距离增大和楼层升高变电站振动与噪声及低频特性衰减不显著。

Testing Study on Structure Vibration and Noise Characteristics of Underground Substation

Taking 220 kV Chaoyangmen underground substation and its coupled architectures as the test object, the vibration and noise signals of testing points were acquired which were located on the concrete floor, wall, foundation and transformer tank in the transformer room and each stories of overground and underground. The time domain analysis and frequency spectrum analysis for the test data were carried out. The results show that: firstly, the vibration amplitude of transformer tank wall is large, the vibration spectra of transformer tank are mainly 100 Hz and resonant frequency, and the vibration spectra of the concrete foundation, floor and wall in the transformer room are very similar； secondly, during the design of the underground or indoor substation, structure vibration and noise must be considered which can spread to the whole underground substation and building structure； thirdly, the attenuation of vibration, noise and low spectrum characteristics are not obvious with the increase of distance or the rise of floors.