| 对屏蔽系数和安全距离计算公式的理解和探讨 |
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| 引用本文： | 马金福,冯志伟,汝洪博,朱奎荣.对屏蔽系数和安全距离计算公式的理解和探讨[J].建筑电气,2012,31(8):59-62. |
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| 作者姓名： | 马金福 冯志伟 汝洪博 朱奎荣 |
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| 作者单位： | 湖州市防雷中心,浙江省湖州市,313000 |
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| 摘 要： | 分析屏蔽系数和安全距离计算公式的几个不合理之处:当钢材半径和屏蔽体的网格尺寸符合一定关系时,屏蔽系数的计算结果有可能为负值;闪电击于格栅形大空间屏蔽体以外,当网格宽度大于3.13m时,安全距离随网格宽度增大而减小;网格宽度小于2.69m时,雷电直接击在格栅形大空间屏蔽体上的安全距离小于雷电击在屏蔽体以外时的安全距离。
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| 关 键 词： | 建筑物防雷 屏蔽系数 安全距离 |
Comprehension and Study on Calculations Formulas of Shielding Factor and Safe Distance |
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| Ma Jinfu Feng Zhiwei Ru Hongbo Zhu Kuirong.Comprehension and Study on Calculations Formulas of Shielding Factor and Safe Distance[J].Building Electricity,2012,31(8):59-62. |
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| Authors: | Ma Jinfu Feng Zhiwei Ru Hongbo Zhu Kuirong |
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| Affiliation: | Ma Jinfu Feng Zhiwei Ru Hongbo Zhu Kuirong (Huzhou Lightning Protection Center, Huzhou 313000, Zhejiang Province, China) |
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| Abstract: | Some irrational points in the calculation formulas for shielding factor and safe distance are analyzed： when the radius of steel products has a certain relation with the grid size of the shield, the calculated result of the shielding factor may be a negative value; for the lightning to strike on the outside of a grid-shaped large- space shield, when the grid width is larger than 3.13 m, the safe distance will be shortened with the increase of the grid width; when the grid width is smaller than 2.69 m, the safe distance for the lightning to strike directly on the grid- shaped large- space shield is smaller than that on the outside of the shield. |
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| Keywords: | Protection of structures against lightning Shielding factor Safe distance |
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