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钢结构建筑物磁场特征定量评估

DOI: 10.3969/j.issn.1006??7043.201305069??

Keywords: 电气工程, 钢结构建筑物, 缩比模型试验, 磁场特征, 磁矩量法??

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Abstract:

为了研究钢结构建筑物的磁场特征, 基于相似性定律制作了典型钢结构建筑物的磁性物理缩比模型。并进行了磁场测量试验, 分离出了缩比模型的感应和永久磁性的磁场特征。基于缩比模型试验数据, 建立了基于磁矩量法的钢结构建筑物磁场特征数学模型, 并分析了其衰减特性。一座边长12 m的立方体钢结构建筑物磁场特征评估分析表明, 在建筑物一侧0~100 m的地面上, 其磁场特征幅值从6 400 nT迅速下降为0.005 nT, 在建筑物周围100 m之外的区域产生的磁场已可忽略不计。本研究采用物理模型和数值模拟相结合的手段, 实现了钢结构建筑物磁场特征的定量分析。 该技术适用于磁测量设施周边建筑物干扰磁场的精确评估, 具有较高实用价值。

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