Numerical simulation method for electromagnetic energy absorbed by human body in complex electromagnetic environment

Abstract

The invention discloses a numerical simulation method for electromagnetic energy absorbed by a human body in a complex electromagnetic environment, and mainly solves the problem that the condition of electromagnetic energy absorbed by the human body is difficult to evaluate by the existing method in the complex electromagnetic environment. The method comprises the following steps: 1) establishing a complex electromagnetic environment geometric model and performing surface subdivision on the model; 2) acquiring the electric field intensity of the position of the human body by adopting a consistency diffraction theory according to the information obtained by surface subdivision; 3) establishing a high-precision human body geometric model and performing surface subdivision on the high-precision human body geometric model; 4) irradiating the human body by adopting plane waves with the same electric field intensity; 5) acquiring electric field distribution in the human body model by using a parallel multilayer fast multi-pole algorithm; and 6) calculating the specific absorption rate in the model by using the electric field distribution to obtain the SAR distribution of the whole human body model. The energy absorption condition of the personnel in the complex electromagnetic environment can be analyzed, accurate simulation data can be quickly obtained, and a reliable basis is provided for evaluation of electromagnetic energy absorption of the personnel in the complex electromagnetic environment.

Description

technical field [0001] The invention belongs to the technical field of electricity, and further relates to computational electromagnetics, specifically a numerical simulation method for absorbing electromagnetic energy by a human body in a complex electromagnetic environment, which can be used to evaluate the electromagnetic energy absorption of a person in a complex electromagnetic environment. Background technique [0002] Antenna is an indispensable component in radar, communication and other fields, and its main function is to transmit and receive electromagnetic waves. When the human body is near the antenna, part of the electromagnetic waves radiated by the antenna will be absorbed by the human body tissue, which will cause the body tissue and organs to heat up, and the temperature will rise. If the temperature rise is too high, it may cause irreversible damage to the human body. Electromagnetic energy is evaluated. For reasons of ethics and evaluation accuracy, it is...

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Problems solved by technology

[0003] The purpose of the present invention is to address the deficiencies of the above-mentioned prior art, mainly aiming at the difficult problem of numerical simulation of electromagnetic energy absorbed by the human body in a complex electromagnetic environment, and propose a hybrid method based on consistent diffraction theory and parallel multi-layer fast multi-pole algorithm. The complex electromagnetic environment is simulated by the theory of magnetic diffraction, and the electric field intensity at the position of the human body is obtained, and then the human body is irradiated with a plane wave with the same electric field intensity, and the electric field distribution inside the human body is analyzed by using the parallel multi-layer fast multipole algorithm, and then calculated Specific Absorption Rate (SAR) inside the human body, so as to realize the evaluation of electromagnetic energy absorbed by people in complex electromagnetic environments

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