屏蔽多导体强电磁脉冲响应的FDTD-MTL混合计算方法研究

 利用电缆的转移阻抗，将空间电磁场在电缆屏蔽层产生的电流作为多导体传输线（MTL）方程中的激励源，提出了计算编织屏蔽多导体电磁脉冲(EMP)响应的FDTD-MTL混合计算方法。分析了电缆转移阻抗的计算模型，并同实验结果进行了比较，证明Tyni提出的转移阻抗模型更符合实验结果。最后，利用该混合方法得到了三导体屏蔽电缆的强电磁脉冲响应。

FDTD-MTL method for EMP response of shielded MTL

A novel method in time domain for the response of high power EMP with braided-shield multi-conductor cable is proposed.The current on the shield can be used as the stimulus of the MTL equations based on the definition of the transfer impedance.The current on the shield,the core current and the core-to-shield voltage are obtained by the FDTD method combining the MTL equations with the field equations.A comparative study is carried out against the transfer impedance models proposed by Vance and Tyni.As an example of the application of the FDTD-MTL method,the response of high power EMP with three-conductor braided-shield cable is obtained.