电磁脉冲对细线耦合的时域多分辨分析
Multiresolution time domain analysis of electromagnetic pulse coupling to thin wires
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摘要: 对利用时域多分辨分析(MRTD)方法计算电磁脉冲(EMP)与细线耦合的问题进行了研究。将传统Holland细线算法应用到时域多分辨分析当中，推导出了MRTD方法中对细线结构处理的一种算法，并给出了具体的计算步骤和相关参数的选取方法。计算表明，采用MRTD方法计算细线问题，可以取较大的空间步长，一般可以取到最短工作波长的1/4左右，有效地节约了计算资源；MRTD方法也可以较方便地处理细线位于大地附近的情况，为计算地面铺设较长细线的EMP耦合提供了一种途径。Abstract: The technique of using multiresolution-time-domain (MRTD) method to solve the issue of electromagnetic pulse (EMP) coupling to thin wires was researched. Traditional Holland method was applied to MRTD, and a scheme in MRTD was produced to calculate the EMP coupling of thin wire structures. The computational process of the scheme was presented as well as correlative parameters. The result indicates that the maximum space step length which is equal to a quater of the smallest wavelength can be employed in the MRTD scheme with computational resources being saved effectively, MRTD is suitable to deal with the thin wire-EMP coupling in condition of thin wires being laid on ground surface, and the MRTD scheme is a proper way to compute ground-laying thin-wire issue.
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