The consistent physic-mathematical model of propagation of an electromagnetic wave in a heterogeneous medium is constructed using the generalized wave equation and the Dirichlet theorem. Twelve conditions at the inter...The consistent physic-mathematical model of propagation of an electromagnetic wave in a heterogeneous medium is constructed using the generalized wave equation and the Dirichlet theorem. Twelve conditions at the interfaces of adjacent media are obtained and justified without using a surface charge and surface current in explicit form. The conditions are fulfilled automatically in each section of counting schemes for calculations. A consistent physicomathematical model of interaction of nonstationary electric and thermal fields in a layered medium with allowance or mass transfer is constructed. The model is based on the methods of thermodynamics and on the equations of an electromagnetic field and is formulated without explicit separation of the charge carriers and the charge of an electric double layer. The influence of a slowly moving medium on the electromagnetic wave propagation is considered. The calculation results show the absence of the influence of the medium’s motion on the phase shift of waves, which is consistent with experimental data.展开更多
用XFDTD软件模拟计算了雷电电场强度为50 k V、上升沿约为4μs、脉宽为20μs的雷电电磁脉冲与计算机耦合后,在计算机机箱内几个典型位置处的耦合电场强度和能量密度随时间变化的曲线,并分析了计算机内部不同位置处的屏蔽效能。耦合产生...用XFDTD软件模拟计算了雷电电场强度为50 k V、上升沿约为4μs、脉宽为20μs的雷电电磁脉冲与计算机耦合后,在计算机机箱内几个典型位置处的耦合电场强度和能量密度随时间变化的曲线,并分析了计算机内部不同位置处的屏蔽效能。耦合产生的能量密度与对计算机系统造成损害的电磁脉冲功率密度的阈值相比可知,机箱内耦合产生的能量不影响计算机的正常工作,但在孔洞处耦合产生的能量很大。展开更多
文摘The consistent physic-mathematical model of propagation of an electromagnetic wave in a heterogeneous medium is constructed using the generalized wave equation and the Dirichlet theorem. Twelve conditions at the interfaces of adjacent media are obtained and justified without using a surface charge and surface current in explicit form. The conditions are fulfilled automatically in each section of counting schemes for calculations. A consistent physicomathematical model of interaction of nonstationary electric and thermal fields in a layered medium with allowance or mass transfer is constructed. The model is based on the methods of thermodynamics and on the equations of an electromagnetic field and is formulated without explicit separation of the charge carriers and the charge of an electric double layer. The influence of a slowly moving medium on the electromagnetic wave propagation is considered. The calculation results show the absence of the influence of the medium’s motion on the phase shift of waves, which is consistent with experimental data.
文摘用XFDTD软件模拟计算了雷电电场强度为50 k V、上升沿约为4μs、脉宽为20μs的雷电电磁脉冲与计算机耦合后,在计算机机箱内几个典型位置处的耦合电场强度和能量密度随时间变化的曲线,并分析了计算机内部不同位置处的屏蔽效能。耦合产生的能量密度与对计算机系统造成损害的电磁脉冲功率密度的阈值相比可知,机箱内耦合产生的能量不影响计算机的正常工作,但在孔洞处耦合产生的能量很大。
