Electric Stress Distribution In The Human Body Exposed To Electromagnetic Fields

The interaction of stable plane wave and electromagnetic pulse fields with human body is studied in this paper based electric field stress. The research is of great importance both in theory and in practice. It can offer databases not only for electromagnetic domestic research, but also for medical application in the future (for example a blind man may be generated acoustic signals for microwave auditory effects), also for the pre-study of microwave being used as weapon.In this paper, the calculation is made of the electric stress distribution and specific absorption rate (SAR) distribution in the human body exposed to the stable plane wave and nuclear explosion electromagnetic pulse and microwave weapon electromagnetic pulse. The highlights hi the research are:Firstly, the software to realize FDTD (finite-difference time-domain) method and (FD)2TD (frequency-dependent finite-difference time-domain) method were programmed, and their correctness is verified.Secondly, the human body is simulated by a model with inhomogeneous dielectric constant and conductivity hi the FDTD program to calculate the effect of stable plane wave to the human body, hi the same time the mode can be used hi (FD)2TD programmed to calculate the effect of electromagnetic pulse to the human body by using Debye parameter.Thirdly, the stress distribution in the human body exposed to stable plane wave is calculated in different incident direction and different polarized. Also the stress exerts on the surface between human skull and brain tissue is calculated when the human body is exposed to nuclear explosion electromagnetic pulse or microwave weapon electromagnetic pulse in left incident direction and parallel polarized.The conclusions are followed: l.when the human body is exposed to plane wave (100MHz or 300MHz), the left incident wave will have higher effects on body than the front (or back) incident wave, including the stress distribution and SAR. 1. when the human body is exposed to nuclear explosion electromagnetic pulse, the peak stress exerted on the skull surface was calculated to be 43.4718 pa. 3. when the human body is exposed to microwave weapon electromagnetic pulse , the peak stress exerted on the skull surface was calculated to be 4.3277 X 105 pa.