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复杂电磁环境中屏蔽电缆场线耦合效应的仿真分析.rar

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    编号:20181030002150154    类型:共享资源    大小:14.78MB    格式:RAR    上传时间:2018-10-30
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    复杂 电磁 环境 屏蔽 电缆 耦合 效应 仿真 分析
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    学校代码: 10286分类号: TN011 密 级: 公开 UDC: 621.3 学 号: 090532 复杂电磁环境中屏蔽电缆场线耦合效应的仿真分析研究生姓名: 万莉 导 师 姓 名: 陆卫兵 教授 申请学位类别 工学硕士 学位授予单位 东 南 大 学 一级学科名称 电子科学与技术 论文答辩日期 2012 年 4 月 19 日 二级学科名称 电磁场与微波技术 学位授予日期 20 年 月 日 答辩委员会主席 倪振华 评 阅 人 钱澄 李茁 2012 年 4 月 19 日Simulation and Analysis of the Field-Line Coupling Effects of Shielded Cables in Complex Electromagnetic EnvironmentA Dissertation Submitted toSoutheast UniversityFor the Academic Degree of Master of ScienceByWan LiSupervised byProfessor Lu WeibingState Key Laboratory of Millimeter WavesSchool of Information Science and EngineeringSoutheast UniversityNanjing, 210096, P. R. China东 南 大 学 学 位 论 文 独 创 性 声 明本人声明所呈交的学位论文是我个人在导师指导下进行的研究工作及取得的研究成果。尽我所知,除了文中特别加以标注和致谢的地方外,论文中不包含其他人已经发表或撰写过的研究成果,也不包含为获得东南大学或其它教育机构的学位或证书而使用过的材料。与我一同工作的同志对本研究所做的任何贡献均已在论文中作了明确的说明并表示了谢意。研究生签名: 日 期: 东 南 大 学 学 位 论 文 使 用 授 权 声 明东南大学、中国科学技术信息研究所、国家图书馆有权保留本人所送交学位论文的复印件和电子文档,可以采用影印、缩印或其他复制手段保存论文。本人电子文档的内容和纸质论文的内容相一致。除在保密期内的保密论文外,允许论文被查阅和借阅,可以公布(包括刊登)论文的全部或部分内容。论文的公布(包括刊登)授权东南大学研究生院办理。研究生签名: 导师签名: 日 期:摘要I复杂电磁环境中屏蔽电缆场线耦合效应的仿真分析硕士研究生:万莉 导师:陆卫兵 教授(东南大学 信息科学与工程学院 毫米波国家重点实验室)摘 要屏蔽电缆作为机载、舰载等复杂平台上各个电子设备的连接器件,将不可避免地暴露在复杂电磁环境中。当其受到复杂电磁环境中的高功率电磁脉冲(HPEMP)冲击时,绝大部分的耦合瞬态电流将直接流过其屏蔽层,而不进入其内芯导体。但受屏蔽层结构和屏蔽性能的限制,HPEMP 仍可通过转移阻抗耦合进入电缆的内芯,进而产生瞬态感应电流。结果可能会导致电子设备性能降低,通信中断,严重时可能影响到整个平台的安全。因此,有必要对复杂电磁环境中屏蔽电缆的场线耦合效应进行准确分析。本文选择 CST 软件,采用基于全波方法和等效传输线模型方法相结合的混合方法对高功率电磁脉冲与屏蔽电缆的场线耦合效应进行了系统的场路联合仿真分析,其主要研究内容包括以下几个方面:(1)对屏蔽电缆所处的复杂高功率电磁环境中的高功率脉冲源进行了深入研究,分析了核爆炸、雷击以及超宽带等电磁脉冲的特点,并采用 VBA 语言对 CST 软件进行二次开发,建立了高功率电磁脉冲激励源库,可方便地在 CST 软件中实现加载导入。(2)对高功率电磁脉冲的耦合途径进行了介绍,重点对高功率电磁脉冲与屏蔽机箱的孔缝耦合效应进行了全波仿真分析。(3)对管状型和编织型两种典型屏蔽结构的屏蔽电缆的转移阻抗进行了计算,并对这两种同轴屏蔽电缆屏蔽性能进行初步分析。同时,采用 CST 软件的 CS 工作室对核爆电磁脉冲下两个屏蔽方舱间和单个方舱内部的屏蔽电缆场线耦合问题进行了仿真分析,并得出了同转移阻抗准则相一致的结论。(4)最后,以 VFY218 飞机为例,在飞机覆盖铝蒙皮的情况下,采用摘要IIMicrostripes(MS)工作室的精简模型和 CS 工作室联合对雷击脉冲下机舱内多条屏蔽电缆的场线耦合效应进行了场路协同仿真分析,并对其电磁兼容安全裕度进行了评估分析,为系统分析屏蔽电缆场线耦合问题提供了整体方案,可用于指导电磁兼容和高功率电磁脉冲防护设计。关键词:高功率电磁脉冲,二次开发,联合仿真,转移阻抗,电磁兼容AbstractIIIAbstractShielded Cables, the connectors between various subsets of communication networks and communication systems on complex platform such as airborne and warship, are inevitably exposed in the complex electromagnetic environment on board. While they are impacted by high power electromagentic pulse (HPEMP) in complex electromagentic environment, most of directed coupled transient current only flows through the outer shielded layer, rather than the inner conductor of cable. However, with the limitation of the cable shielded layer structure and shielding effectiveness, the outward energy of HPEMP can still couple into inner core through the transfer of shielded layer, and generate transient induced current on the inner conductor. Then, the transiect current can reduce the performance of electronic devices and interrupt communications, and even seriously affect the safety of entire platform. Therefore, it’s necessary to make an accurate analysis of field-line coupling effects of shielded cables in complex electromagnetic environment. In this paper, we make a system analysis of the field-line coupling effects between HPEMP and shielded cables using CST software. The co-simulation which combines the field method with circuit method is implemented. The main contents are listed as follows:(1) The high power pulse excitation sources are further studied, which compose the complex electromagnetic environment surrounding shielded cables, and the characteristics of some high power electromagnetic pulses are analyzed, such as Nuclear EM pulse, Lightning EM pulse, and Ultra Wide Band. Then, the library of HPEMP excitation sources is developed based on CST software using VBA language, which is convenient to be loaded by CST. (2) The HEMP coupling paths to systems are elaborated, especially a full wave simulation of the coupling effects between HEMP and aperture of shielded box through CST is made.(3) The transfer impedance of two typical shielded coax cables of tubular and braid is calculated respectively, with preliminary analysis of shielding effectiveness of the two coax cables. Meanwhile, the field-line coupling effects between nuclear EMP and shielded cables which are located in a shielded cabin and between two cabins, are simulated and analyzed using the cable studio of CST, of which the conclusion is consistent with that of the transfer impedance criteria.(4) Finally, VFY218 is taken as an example, which is coated with aluminum thin panel. The field-line coupling effects of a few shielded cables in VFY218 under lightning EMP are co-simulated with the cooperation of the compact model of microstripes and cable studio, AbstractIVwhich combine the field method with circuit method. The electromagnetic compatibility safety margin of shielded cables is estimated and analyzed. An overall scheme for systematically solving the field-line coupling problem of shielded cables is provided, which can be used to guide the designs of electromagnetic compatibility and HPEMP protection.Key words: High Power Electromagnetic Pulse, Software Development, Co-Simulation,Transfer Impedance, Electromagnetic Compatibility
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