| 列车对半椭圆形隧道中电磁波截止频率的影响 |
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| 引用本文： | 刘玲丽,谢应茂.列车对半椭圆形隧道中电磁波截止频率的影响[J].赣南师范学院学报,2008,29(3):54-57. |
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| 作者姓名： | 刘玲丽 谢应茂 |
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| 作者单位： | 赣南师范学院,物理与电子信息学院,江西,赣州,341000 |
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| 摘 要： | 将隧道看成波导,列车的存在改变了隧道的截面形状和尺寸,从而影响了电磁波的截止频率.在对列车—隧道导波问题进行物理建模的基础上,应用有限元法研究了列车的高度、宽度和位置以及半椭圆形隧道椭圆的偏心率的变化对半椭圆形隧道电磁波截止频率的影响.
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| 关 键 词： | 列车 半椭圆形隧道 截止频率 有限元法 |
Effect of Train on the Cut-off Frequency of Semi-elliptical Tunnel |
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| LIU Ling-li,XIE Ying-mao.Effect of Train on the Cut-off Frequency of Semi-elliptical Tunnel[J].Journal of Gannan Teachers' College(Social Science(2)),2008,29(3):54-57. |
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| Authors: | LIU Ling-li XIE Ying-mao |
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| Institution: | (School of Physics and Electronic Information, Gannan University, Ganzhou 341000, China) |
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| Abstract: | The cut-off frequency can be changed by a train in the tunnel,which seriously affected the transmission of electromagnetic wave,when the tunnel had been regarded as a waveguide.This is due to the modification of the shape and size of the tunnel's section.In this paper,the train-tunnel is constructed as a model of waveguide and the boundary-value problem is obtained.The FEM is used to analyze the semi-oval tunnel's cut-off frequency when the train's height or width or location is changed in the tunnel,as well as the changes in eccentricity of the semi-oval tunnel.According to the calculation of the cut-off frequency,the changing characteristic of cut-off frequency in the tunnel is studied. |
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| Keywords: | train semi-elliptical tunnel cut-off frequency finite element method |
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