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采用时域有限差分(FDTD)法计算了开孔屏蔽室对单脉冲平面波的耦合,取得了与实测波形一致的结果。计算结果表明:若入射波传播方向垂直于开孔面,则屏蔽室内的耦合场仅取决于屏蔽腔体的谐振特性;若入射波传播方向平行于开孔面,则屏蔽室内的耦合场为具有源特征的低频分量与屏蔽室内的高频谐振波分量组成。
The finite element time-domain (FDTD) method was used to calculate the coupling of the open-hole shield room to the single-pulse plane wave. The results were consistent with the measured waveforms. The calculation results show that if the incident wave propagation direction is perpendicular to the open face, the coupling field in the shielded room depends only on the resonance characteristics of the shielded cavity. If the incident wave propagation direction is parallel to the open face, the coupling field in the shielded room is The low frequency components of the source features and the high frequency resonance wave components in the shielded room.