| 金属网屏蔽笼屏蔽效能的计算模型及方法 |
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| 引用本文： | 解子凤,石岗,戴传友.金属网屏蔽笼屏蔽效能的计算模型及方法[J].清华大学学报(自然科学版),1998(9). |
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| 作者姓名： | 解子凤 石岗 戴传友 |
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| 作者单位： | 清华大学电机工程与应用电子工程系，武汉水利电力大学 |
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| 摘 要： | 为了研究金属网状屏蔽体屏蔽雷电冲击磁场的屏蔽效能，考虑到雷电波在波头部分的波长远大于一般屏蔽体的尺寸，可用电路方法求解，因此采用回路电流法计算金属网屏蔽体的屏蔽效能。根据场源的对称性，提出将立方形网状屏蔽体简化为圆柱形同轴圆环的计算方法。此算法实现了在微机上对密网孔大体积的屏蔽体的暂态屏蔽效能进行计算。其计算结果与实测值是吻合的。
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| 关 键 词： | 回路电流法 金属网屏蔽笼 屏蔽效能 冲击磁场 |
Computing model and method for shielding effectiveness of shielding cage in impulse magnetic field |
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| Abstract: | To research the shielding effectiveness of the shielding cage of metal nets in the impulse magnetic field caused by lightning, considering the wavelength of lightning is much larger than the shielding cage, the loop current computing method is presented. According to the symmetry of the magnetic field source, the cubic shielding cage is simplified to coaxial circles in a column. Therefore, the computing time and memory are greatly shortened, the shielding effectiveness of large metal net shielding cages can be computed with personal computer. The results of computations are in accordance with those of experiments. |
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