煤矿巷道中运输机车对电磁波截止频率的影响

Effects of Electric Locomotive on Cut-off Frequencies of Electromagnetic Wave in Coal Mine Tunnel

在空巷道中电磁波存在着截止频率,机车的存在改变了巷道的截面形状和尺寸,从而对电磁波的截止频率有一定的影响。将巷道看作波导,利用有限元法,分析了矩形巷道,半圆拱形巷道以及圆形巷道中机车高度对电磁波截止频率的影响。

There exist cut-off frequencies of electromagnetic wave in a tunnel. Existence of the electric locomotive can change a section shape and size of the tunnel, resulting in certain effect on the cutoff frequencies of electromagnetic wave. Taking the tunnel as wave-guide, the finite element method was used to analyze a rectangular tunnel, semicircular arch tunnel and the effect of height of the electric locomotive on the cut-off frequencies of electromagnetic wave in the circular tunnel.