發(fā)布時(shí)間：2018-01-20 09:32

  本文關(guān)鍵詞： 微波防護(hù)服 防護(hù)效能 時(shí)域有限差分方法 比吸收率 孔縫 解剖學(xué)人體模型　出處：《華東師范大學(xué)》2017年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著經(jīng)濟(jì)社會的快速發(fā)展和電磁技術(shù)的進(jìn)步,電磁設(shè)施和設(shè)備的應(yīng)用日益廣泛,環(huán)境電磁輻射水平也隨之增強(qiáng),因電磁暴露帶來的健康問題受到人們的嚴(yán)重關(guān)注。我國相關(guān)法規(guī)規(guī)定,環(huán)境電磁輻照水平超出10 w/m2時(shí)必須采取適當(dāng)?shù)姆雷o(hù)措施。除了對電磁輻照源進(jìn)行嚴(yán)格管控外,電磁防護(hù)服的穿戴是目前對人員的防護(hù)中使用較為廣泛的被動措施之一。在電磁防護(hù)服的設(shè)計(jì)和制造中,從防護(hù)服孔、縫進(jìn)入人體的電磁能量是需要考慮的重要問題,也是決定電磁防護(hù)服防護(hù)效能的關(guān)鍵因素�，F(xiàn)有的電磁防護(hù)服實(shí)驗(yàn)和理論研究主要把關(guān)注的重點(diǎn)放在防護(hù)服面料的電磁屏蔽性能上,較少考慮防護(hù)服開口設(shè)計(jì)的影響,將防護(hù)服和人體作為統(tǒng)一系統(tǒng)的研究也很欠缺。為此,本文在真實(shí)人體解剖學(xué)模型的基礎(chǔ)上,運(yùn)用時(shí)域有限差分法計(jì)算了良導(dǎo)體防護(hù)服在0.3-3 GHz頻段內(nèi),平面波從不同方向以各種極化方式輻照下,著裝狀態(tài)人體的電磁吸收及防護(hù)服開口大小對其電磁防護(hù)性能的影響。我們通過計(jì)算穿著防護(hù)服前后,人體模型內(nèi)電磁能量吸收的變化,主要得到如下規(guī)律(1)良導(dǎo)體防護(hù)服上所開的孔縫是其電磁泄露的主要原因,當(dāng)縫隙與電磁波的電場極化方向垂直時(shí),電磁波的能量更容易發(fā)生泄漏;(2)當(dāng)電磁波頻率在0.3 GHz到3 GHz之間時(shí),相同開口設(shè)計(jì)的良導(dǎo)體防護(hù)服的防護(hù)效能隨頻率的增高而增強(qiáng),并趨于穩(wěn)定;(3)對孔縫不進(jìn)行處理的防護(hù)服一般難以達(dá)到30 dB以上的防護(hù)效果。我們提出了一種抑制孔縫電磁泄漏的新方法,仿真分析表明,能很好地抑制防護(hù)服孔縫電磁泄漏,可有效提升防護(hù)服的防護(hù)性能。本文的研究為防護(hù)服的設(shè)計(jì)提供了技術(shù)支撐。
[Abstract]:With the rapid development of economy and society and the progress of electromagnetic technology, the application of electromagnetic facilities and equipment is increasingly widespread, and the level of environmental electromagnetic radiation is also enhanced. Due to electromagnetic exposure to health problems caused by people's serious concern. China's relevant laws and regulations. Appropriate protective measures must be taken when the ambient electromagnetic radiation level exceeds 10 w/ m ~ 2. In addition to strict control of electromagnetic radiation sources. The wear of electromagnetic protective clothing is one of the more widely used passive measures in the protection of personnel. In the design and manufacture of electromagnetic protective clothing, the hole of protective clothing is used. The electromagnetic energy that seams into the human body is an important issue to be considered. It is also a key factor to determine the effectiveness of electromagnetic protective clothing. The existing electromagnetic protective clothing experiments and theoretical research mainly focus on the electromagnetic shielding performance of protective clothing fabric. Less consideration is given to the influence of the design of the opening of protective clothing, and the study of the uniform system of protective clothing and human body is also lacking. Therefore, this paper is based on the real anatomy model of human body. The finite difference time-domain (FDTD) method is used to calculate the radiation of plane wave in the range of 0.3-3 GHz under various polarization modes. The effect of the electromagnetic absorption and the size of the opening of the protective clothing on the electromagnetic protection performance. We calculate the changes of the electromagnetic energy absorption in the human body model before and after wearing the protective clothing. The main results are as follows: 1) the main reason of electromagnetic leakage is the opening of holes in good conductor protective clothing. When the gap is perpendicular to the polarization direction of the electric field of the electromagnetic wave, the energy of the electromagnetic wave is more likely to leak; (2) when the frequency of electromagnetic wave is between 0.3 GHz and 3 GHz, the protective efficiency of the good conductor protective clothing designed with the same opening increases with the increase of frequency and tends to be stable; 3) the protective clothing without the treatment of hole seam is difficult to achieve more than 30dB protective effect. We propose a new method to restrain the electromagnetic leakage of the hole seam, and the simulation results show that the method is more than 30 dB. This paper provides technical support for the design of protective clothing.
【學(xué)位授予單位】：華東師范大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2017
【分類號】：TS941.731.7

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