摘要
研究理想带孔缝金属机箱在电磁脉冲(EMP)激励下的电场屏蔽效能(SE),对不同结构和不同数量孔缝的耦合结果进行了讨论。耦合电场的分布呈现明显的谐振现象,谐振峰值位于机箱中心区域。对于面积相同的单孔缝,当入射波极化方向与矩形缝短边平行时,矩形缝机箱的屏蔽效能最小,圆孔机箱的屏蔽效能最大。在保持总开孔面积不变的情况下,将较大的单孔缝分解成多个较小的孔缝,可有效增大机箱的屏蔽效能。另外,采用双层屏蔽也可显著提高机箱的屏蔽效能。
Shielding effectiveness（SE）of metallic enclosures with apertures excited by EMP is investigated.The coupling results of different configurations and number of apertures are discussed.The electric field evolvement exhibit resonant behaviour evidently and the resonant peak is highest at the center inside the enclosure.For the case of the same area of a single aperture,when the polarization direction is paralleling to the shorter side of the rectangula,the SE of the enclosure with rectangular aperture is lowest,and which with circle aperture is highest. The SE of the enclosure with double-layers wall is improved significantly. Besides, keeping the total area unaltered, dividing the single larger aperture into multiple smaller apertures,the SE will be increased
出处
《舰船科学技术》
2009年第9期78-81,86,共5页
Ship Science and Technology
基金
中船重工预研支撑技术项目(62201010401)
