矿井隧道中罐笼对电磁波截止频率的影响  

Effects of cage on electromagnetic wave cutoff frequency in mine tunnel

作　　者：魏占永[1] 陆俭国[2] 潘振克 管瑞良 刘会丽[3] 孙继平[4] 

机构地区：[1]常熟开关制造有限公司,江苏常熟215500 [2]河北工业大学电器研究所,天津300130 [3]河北工业大学理学院,天津300130 [4]中国矿业大学北京校区信息工程研究所,北京100083

出　　处：《电波科学学报》2004年第6期780-784,共5页Chinese Journal of Radio Science

摘　　要：把矿井隧道看作波导 ,利用有限元法分析了隧道中的罐笼对电磁波截止频率的影响 ,并得到数值结果。得知罐笼的存在使TE模式的截止频率降低 ,而使TM模式的截止频率升高 ,而且随着罐笼尺寸的增加 ,TE模式的截止频率缓慢下降 ,TM模式的截止频率则迅速上升 ,这种趋势越来越明显。对于TM模式来说 ,当罐笼与隧道的截面之比接近于 1时会出现模式简并。The effects of cage in mine tunnel on the cutoff frequency is analyzed by the finite element method when the tunnel is regarded as a waveguide, and the numerical results are obtained. The cage in tunnel lowes TE mode cutoff frequency and raises TM mode cutoff frequency. AS the area of cage becomes larger, the TE mode cutoff frequency falls slowly and TM mode cutoff frequency raises rapidly. When the cross-section ratio of cage and tunnel is close to one, the model degeneration of TM mode appears.

关 键 词：矿井隧道 有限元法 电磁波 罐笼 截止频率 

分 类 号：TD65[矿业工程—矿山机电]