隧道中电波传播特性FDTD分析方法研究
发布时间：2018-11-12 18:24
【摘要】：隧道是一种特殊的受限空间,一般具有复杂结构和介质参数,无线信号传播会受到隧道的截面形状、尺寸、围岩材料电参数、电波工作频率等因素的影响,其无线电信道完全不同于地面无线电信道,无法照搬地面上的有关理论。因此,开展隧道等受限空间内无线电波传播特性FDTD分析方法研究,搞清隧道截面形状、尺寸、围岩电磁参数、电波工作频率等对电波传播特性的影响,不仅可以拓展隧道内电波传播特性分析的途径,拓宽FDTD方法的应用范围,研究成果还可以进一步推广到相关受限空间内电磁问题的数值分析,而且对完善隧道中无线传输理论、指导隧道移动通信系统建设、交通运输安全、煤矿以及矿山救护等工作具有十分重要的理论意义和使用价值。本文主要工作有:1.研究了波导端口激励源加入方法,通过算例验证了该方法良好的波形保真性和普遍性;2.研究了截面为圆形、矩形和拱形隧道中各主波模衰减率,分析了隧道截面尺寸、形状、电波工作频率、相对介电常数对衰减率的影响;3.研究了Compact-2D-FDTD算法,并用实变量Compact-2D-FDTD算法分析了截面为圆形、矩形和拱形隧道中电波传播特性,通过与解析法对比,验证了该方法的有效性;4.研究了基于MPI-Open MP混合平台的并行技术,实现了基于MPIOpen MP混合平台的隧道中电波传播特性分析三维并行FDTD算法,证明了该方法的正确性和有效性。
[Abstract]:Tunnel is a special limited space, which has complex structure and medium parameters. Wireless signal propagation will be affected by the tunnel cross-section shape, size, surrounding rock material electrical parameters, radio frequency and other factors. The radio channel is completely different from the terrestrial radio channel, and can not copy the related theories on the ground. Therefore, in order to find out the influence of tunnel cross section shape, size, surrounding rock electromagnetic parameters, radio frequency and so on, the FDTD analysis method of radio wave propagation characteristics in confined space, such as tunnel, is carried out to find out the influence of tunnel section shape, size, surrounding rock electromagnetic parameters, radio wave frequency, etc. It can not only expand the way of analyzing the propagation characteristics of radio waves in tunnels, widen the application of FDTD method, but also extend the research results to the numerical analysis of electromagnetic problems in related restricted spaces, and improve the theory of wireless transmission in tunnels. Guiding the construction of tunnel mobile communication system, transportation safety, coal mine and mine rescue work has very important theoretical significance and use value. The main work of this paper is as follows: 1. The method of adding waveguide port excitation source is studied, and the good waveform fidelity and universality of the method are verified by an example. 2. The attenuation rates of main wave modes in circular rectangular and arched tunnels are studied. The effects of tunnel cross section size shape frequency of radio wave and relative dielectric constant on attenuation rate are analyzed. 3. The Compact-2D-FDTD algorithm is studied, and the propagation characteristics of radio waves in circular, rectangular and arched tunnels are analyzed by using the real variable Compact-2D-FDTD algorithm. The validity of the method is verified by comparison with the analytical method. 4. The parallel technology based on MPI-Open MP hybrid platform is studied and the 3D parallel FDTD algorithm based on MPIOpen MP hybrid platform is implemented to analyze the propagation characteristics of radio waves in tunnels. The correctness and effectiveness of the method are proved.
【学位授予单位】：延安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN011
本文编号：2327857
[Abstract]:Tunnel is a special limited space, which has complex structure and medium parameters. Wireless signal propagation will be affected by the tunnel cross-section shape, size, surrounding rock material electrical parameters, radio frequency and other factors. The radio channel is completely different from the terrestrial radio channel, and can not copy the related theories on the ground. Therefore, in order to find out the influence of tunnel cross section shape, size, surrounding rock electromagnetic parameters, radio frequency and so on, the FDTD analysis method of radio wave propagation characteristics in confined space, such as tunnel, is carried out to find out the influence of tunnel section shape, size, surrounding rock electromagnetic parameters, radio wave frequency, etc. It can not only expand the way of analyzing the propagation characteristics of radio waves in tunnels, widen the application of FDTD method, but also extend the research results to the numerical analysis of electromagnetic problems in related restricted spaces, and improve the theory of wireless transmission in tunnels. Guiding the construction of tunnel mobile communication system, transportation safety, coal mine and mine rescue work has very important theoretical significance and use value. The main work of this paper is as follows: 1. The method of adding waveguide port excitation source is studied, and the good waveform fidelity and universality of the method are verified by an example. 2. The attenuation rates of main wave modes in circular rectangular and arched tunnels are studied. The effects of tunnel cross section size shape frequency of radio wave and relative dielectric constant on attenuation rate are analyzed. 3. The Compact-2D-FDTD algorithm is studied, and the propagation characteristics of radio waves in circular, rectangular and arched tunnels are analyzed by using the real variable Compact-2D-FDTD algorithm. The validity of the method is verified by comparison with the analytical method. 4. The parallel technology based on MPI-Open MP hybrid platform is studied and the 3D parallel FDTD algorithm based on MPIOpen MP hybrid platform is implemented to analyze the propagation characteristics of radio waves in tunnels. The correctness and effectiveness of the method are proved.
【学位授予单位】：延安大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN011
【参考文献】
相关期刊论文 前8条
1 张申;隧道无线电射线传输规律的研究[J];电波科学学报;2002年02期
2 张跃平,张文梅,郑国莘,盛剑桓;预测隧道中传播损耗的混合模型[J];电子学报;2001年09期
3 孙继平,石庆冬;空圆形隧道中电磁波的传播特性[J];辽宁工程技术大学学报(自然科学版);2001年02期
4 尹家贤,刘克成,刘培国,毛钧杰;FDTD中波导激励源研究[J];国防科技大学学报;2001年02期
5 周洪斌;温一军;;基于OpenMP的多核程序设计技术[J];沙洲职业工学院学报;2010年02期
6 程峰,杨铨让;实变量Compact 2D FDTD法及窗函数分析传输线特性[J];微波学报;2000年04期
7 李正浩;周俊;刘大刚;;基于OpenMP的电磁场FDTD并行程序性能分析[J];现代电子技术;2008年14期
8 周玉坤;;矩形波导中电磁波传播特性仿真分析[J];现代电子技术;2009年24期
相关硕士学位论文 前1条
1 白剑;FDTD在若干电磁问题中应用的研究[D];西安电子科技大学;2007年
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