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国防工程和人防工程地下工事的自然防护层通常就是指土层或岩石联,众所周知,它具有对炮、炸弹的抗侵彻能力,又具有对核辐射、热辐射的一定防护性能。那么在复杂的电磁环境中,它具有多大的抗电磁波的屏蔽效能呢?这是国防工程和人防工程电磁兼容工作者所关心的问题。本文根据电磁理论,假设自然防护层为均匀的、单一的、各向同性的导电媒质为条件,给出自然防护层抗电磁波的屏蔽效能公式,通过实地测试获得理论与实践相符合的满意结果。
Defense and Civil Air Defense Engineering The natural protective layer of the underground fortifications usually refers to the soil layer or lithosphere. As we all know, it has the capability of anti-penetration to artillery and bombs and has some protection against nuclear radiation and thermal radiation. So in a complex electromagnetic environment, it has much shielding effectiveness of electromagnetic waves it? This is the national defense engineering and civil air defense engineering electromagnetic compatibility issues of concern. Based on the electromagnetic theory, assuming that the natural protective layer is a uniform, single and isotropic conductive medium, the shielding effectiveness formula of the natural protective layer against electromagnetic waves is given. Satisfactory results of theory and practice are obtained through field tests.