分析脉冲电磁场对人体作用的一种人体简易色散模型

A Simplified Dispersive Model of the Human Body Used to Analyze the Interaction of the Electromagnetic Pulse with Human Body

本文用与频率有关的时域有限差分法（（ＦＤ）＾２ＴＤ法），分析了在考虑人体色散特性时，脉冲电磁场与人体的作用。根据人体组织复介电常数实验原始数据在１０ＭＨｚ－３ＧＨｚ的特性，提出一种２类组织（脂肪／骨／软骨、肌肉）简化色散模型。并与用１２类组织色散模型的结果比较，验证了分析人体内感生电流和比吸收量（ＳＡ）时，简化模型同样有数，计算结果显示，持续上于８５ｎｓ。

This paper deals with the interaction of the electromagnetic pulse(EMP) with human body by the Frequency-Dependent Finite-Differenee Time-Domain method((FD)~2TD method). According to the original experimental dielectric constants of human tissue in the frequency band 10MHz-3GHz,this paper proposes a simplified dispersive model of the human body which is composed of two types of tissues (Fet/bone/cartilage, muscle). Both this model and the 12 types of tissues dispersive model are used to analyse Specific Absorption(SA) and Induced Current in human body for exposure to raised-cosine EMP and nuclear EMP for different incident directions. The feasibility of the simplified model is verified by comparing the results. The calculated results show that the maximum SA(15mJ/kg) is three orders lower than the limited values(28.8 J/kg) given by the ANSI/IEEE C95.1-1992 guideline for the human body exposed to the typical nuclear pulse(the maximum E-field is 6SkV/m, and the pulse duration is shorter than 85ns).