摘要
本文采用高分辨率人体电磁辐射模型和非均匀网络时域有限差分法(FDTD),通过比较人体模型在防护前后全身平均比吸收率SAR的变化,建立了防护材料对人体防护性能的评价方法。利用此方法,针对不同频率、不同入射角度的电磁辐射,对不同防护材料的防护性能进行了评价。结果表明,防护材料的防护性能并不仅仅取决于其屏蔽性能,还与防护方式、照射方式等密切相关。局部防护方式对被防护的器官有良好的防护效果。相对于水平照射,斜向上照射时,防护效果较差;斜向下照射时,防护效果较好。
To study the relation between the EM property and shielding efficiency of shielding material, the whole body averaged SAR and organ SARs of the shielding human model have been calculated using FDTD, the effects of different frequencies and different incidence angles have been studied too. The results show the whole body averaged SAR decreases with the improvement of shielding efficiency of shielding material. Because of the EM leakage of neckline, cuff and other openings, the whole body averaged SAR doesn＇t change obviously after it declines to a certain extent. Partial shielding method has the good shielding effect on the shielded organs. Compared with horizontal irradiation, the whole body averaged SAR increases substantially when being irradiated upward, and decreases when being irradiated downward.
出处
《辐射防护》
CAS
CSCD
北大核心
2009年第4期232-236,共5页
Radiation Protection
