| 卢铃,谢紫银,吴晓文,Hakbong Kim,李军,翟国庆.变压器振动在典型建筑结构中的衰减特性*[J].,2021,40(3):474-479 |
| 变压器振动在典型建筑结构中的衰减特性* |
| Attenuation characteristics of transformer vibration in typical building structures |
| 投稿时间：2020-07-09 修订日期：2021-04-29 |
| 中文摘要: |
| 为掌握10 kV居民区配电变压器振动在建筑中的衰减规律，将实测的变压器振动加速度转化为激励力，作用于剪力墙和框架建筑上，采用有限元法仿真研究变压器振动在建筑中的衰减特性。结果表明，在具有相同层高、层数的剪力墙、框架高层建筑中，位于负一层的变压器传播至各楼层的铅垂向振动加速度级(0~500 Hz),随楼层离地高度h对数值(lgh)的增加线性下降，其斜率分别为33.26和24.84，前者的衰减速率(lgh每增加1振动加速度级的衰减量)约为后者的1.3倍；在剪力墙、框架多层建筑中斜率分别为31.87和20.07, 前者的衰减速率约为后者的1.6倍。可见，当建筑层高、层数相同时，变压器振动在剪力墙建筑中比框架建筑中衰减更快；当建筑结构相同时，振动在高层建筑中的衰减速率略大于多层建筑。对0~80 Hz环境振动，变压器振动在剪力墙高层建筑中的铅垂向Z振级衰减速率约为框架高层建筑的2.4倍；剪力墙多层建筑振动衰减速率约为框架多层建筑的3.7倍。在此基础上，建立了变压器传播至剪力墙、框架建筑不同楼层的振动单值和分频段预测模型，可为变压器引起的建筑室内振动预测和控制提供依据。 |
| 英文摘要: |
| In order to explore the vibration attenuation laws of 10 kV distribution transformer in residential area, the measured vibration acceleration of a transformer was converted into an exciting force, which acted on shear wall or frame buildings. The attenuation characteristics of transformer vibration in buildings were simulated through a finite element method. Results showed that the vertical vibration acceleration level (0~500 Hz) of each floor caused by transformer on the first floor below ground would decline linearly with the increase of lgh, the logarithm of height from building floor to ground, when both the height of each floor and the number of floors were all same in a high-rise building with shear wall or frame structure. Their slopes were 33.26 and 24.84, respectively. The attenuation rate in shear wall building, the decrement of vibration acceleration level when lgh increased 1, was about 1.3 times that in frame building. In shear wall and frame multi-story buildings, their slopes were 31.87 and 20.07, respectively, and the attenuation rate of the former was about 1.6 times that of the latter. It could be seen that transformer vibration attenuation rate in a shear wall building would be faster than that in a frame building when the height and number of floors were the same. When a building structure was the same, the attenuation rate of vibration in a high-rise building would be slightly higher than that in a multi-story building. In the case of 0~80 Hz vibration, the attenuation rate of vertical z-weighted vibration level in a high-rise building with a shear wall structure was about 2.4 times that of a high-rise building with a frame structure. The vibration attenuation rate of a shear wall multi-story building was about 3.7 times that of a frame multi-story building. On this basis, the single value and frequency division prediction model of the vibration propagating to different floors of shear wall and frame buildings were established, which can provide the basis for the prediction and control of indoor vibration caused by transformer. |
| DOI：10.11684/j.issn.1000-310X.2021.03.20 |
| 中文关键词: 变压器振动 建筑结构 数值仿真 衰减特性 |
| 英文关键词: transformer vibration building structure numerical simulation attenuation characteristics |
| 基金项目:国家电网有限公司科技项目（5216A019000P） |
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