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| 格栅型钢筋结构的脉冲磁场屏蔽效果 | |
| 引用本文： | 任晓明,傅正财,黄晓虹,孙伟.格栅型钢筋结构的脉冲磁场屏蔽效果[J].现代建筑电气,2010,1(5). |
| 作者姓名： | 任晓明 傅正财 黄晓虹 孙伟 |
| 作者单位： | 1. 上海交通大学,电气工程系,上海,200030;上海市防雷中心,上海,200030 2. 上海交通大学,电气工程系,上海,200030 3. 上海市防雷中心,上海,200030 |
| 摘 要： | 采用有限元的计算方法分析、计算了网格宽度为5m和3m两种情况下建筑物在遭受直击雷和邻近雷击时,格栅型钢筋结构对脉冲磁场的屏蔽效果。计算结果表明,对于直接雷击,随着网格数的增多,支路电流值减小,支路附近的磁场值减少,磁场分布逐渐趋于均匀,安全区域明显增大。网格宽度为3m的危险区域离立柱的水平距离减少为0.5m,与5m网格相比减少了50%。 |
| 关 键 词： | 脉冲磁场 屏蔽 有限元法 直击雷 邻近雷击 |
Shielding Effectiveness of Grid Metal Frame under Impulse Magnetic Fields |
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| REN Xiaoming,FU Zhengcai,HUANG Xiaohong,SUN Wei.Shielding Effectiveness of Grid Metal Frame under Impulse Magnetic Fields[J].Moder Architecture Electric,2010,1(5). | |
| Authors: | REN Xiaoming FU Zhengcai HUANG Xiaohong SUN Wei |
| Affiliation: | 1(1.Department of Electrical Engineering; Shanghai Jiaotong University; Shanghai 200030; China; 2.Shanghai Lightning Protection Center; China); |
| Abstract: | The shielding effect of impulse magnetic fields on the grid metal frame under direct lightning strike or nearby lightning strike were computed and analyzed by using finite element method (FEM) when the grid width were 5 meter and 3 meter respectively.As for the direct lightning strike,the results showed that with the increase of grid number,the value of branch current and magnetic field around decreased,the distribution of magnetic field became more and more uniform,and the safe area increased significantly... |
| Keywords: | impulse magnetic fields shield finite element method（FEM） direct lightning strike nearby lightning stroke |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ | |