列车对梯形隧道中电磁波截止频率的影响

Effect of Train on the Cutoff Frequency of Trapezoid-Tunnel

空隧道作为波导对电磁波存在着截止频率。列车的存在改变了隧道的截面形状和尺寸 ,从而改变了截止频率。本文应用有限元法研究了煤矿井下巷道中列车的高度、宽度和位置对隧道电磁波截止频率的影响 ,其结果对铁路隧道。

A tunnel as a waveguide for electromagnetic wave has a cutoff frequency. The train in the tunnel changes the shape and size of the tunnel's section, so the cutoff frequency is changed. By the use of finite element method. The dependence of the cutoff frequency on the train's height, width and location in the mining laneway is studied. The result is useful to the wireless communication in finite space of railway tunnel, highway tunnel.