宽频电磁脉冲辐照大鼠体内电场分布的仿真计算

Simulation calculation of electric field distribution in rats irradiated using broadband electromagnetic pulse

依据典型宽频电磁脉冲的频谱分布,构建了组织器官精细划分的大鼠色散电磁模型,计算得到两种宽频电磁脉冲辐照大鼠的体内电场分布。结果表明:宽频电磁脉冲作用下大鼠体内场强高度依赖于组织分布,不同波形也会导致体内电场分布不同;透入体内脉冲的脉宽大幅变窄,脉冲在10 kHz~1 MHz的低频能量损失严重;两种宽频电磁脉冲作用下大鼠重要组织器官的峰值场强是空间峰值场强的1%左右。本研究可为体内电场值与脉冲生物效应之间量效关系的确立提供理论依据和量化基础,同时可为宽频电磁脉冲作用生物体的仿真计算提供一定的方法参考。

Based on the spectrum distribution of typical broadband electromagnetic pulses,we constructed a dispersive electromagnetic model rat with fine tissue and organ structure and calculated the internal electric field distribution in rats irradiated by two broadband electromagnetic pulses.The results showed that the field strength in the irradiated rats was highly dependent on the distribution of tissues.Different waveforms produced different electric field distributions in the body.The width of the pulse that penetrated the body was greatly narrowed.Furthermore,the low-frequency energy of the pulse at 10 kHz~1 MHz was markedly reduced.The peak field strength of the important tissues and organs of the irradiated rats was approximately 1%of the spatial peak field strength.The data provide a theoretical quantitative basis for establishment of the dose-effect relationship of pulsed biological effects.The data will also serve as a reference for simulation calculation of the effect of broadband electromagnetic pulses in living organisms.