發(fā)布時間：2019-06-24 20:06

【摘要】：隨著科學(xué)技術(shù)的快速發(fā)展,各種電子設(shè)備在給人們的生活帶來便利的同時,電磁輻射也在時刻威脅著人們的健康。為了有效地保護(hù)人體健康,免受電磁輻射的影響,電磁屏蔽服裝開始進(jìn)入人們的視野,成為電磁防護(hù)用品研究的熱點。但是服裝為了滿足服用性,在制作的過程中會出現(xiàn)一些孔或縫,這在一定程度上影響了電磁屏蔽服裝整體的屏蔽效能,并且電磁屏蔽服裝屏蔽效能測試因受到實驗場地和設(shè)備的限制,只能測得電磁屏蔽服裝在一定頻率范圍內(nèi)的屏蔽效能,不能覆蓋所有情況。因此,本文借助電磁仿真軟件對帶孔、縫的電磁屏蔽服裝屏蔽效能進(jìn)行仿真模擬,以期得到在更寬的頻率范圍內(nèi)孔的大小、個數(shù)和間距以及縫的寬度對電磁屏蔽服裝屏蔽效能的影響規(guī)律。本文首先建立了女性人體模型,其次采用反演法根據(jù)電磁屏蔽基本理論以及建立的人體模型在電磁仿真軟件CST中進(jìn)行仿真實驗的分析驗證,證明了本文所用仿真方法的準(zhǔn)確度。然后建立帶孔縫電磁屏蔽服裝在電磁輻射下的仿真模型,計算出帶有不同孔、縫的電磁屏蔽服裝的屏蔽效能,最后對仿真的結(jié)果進(jìn)行分析,得出不同孔、縫對電磁屏蔽服裝屏蔽效能的影響規(guī)律。仿真結(jié)果表明,電磁屏蔽服裝上孔的大小、間距和位置以及縫隙的寬窄對其屏蔽效能有一定的影響,當(dāng)兩個長方形紐扣孔的面積相差在10mm2以內(nèi)時,長寬比小的長方形孔洞對服裝屏蔽效能的影響更小。紐扣孔的間距在10mm以內(nèi)時會明顯影響服裝整體的屏蔽效能,超過20mm時,服裝整體的屏蔽效能降低,但是紐扣孔的間距則不再影響服裝的屏蔽效能。紐扣孔的個數(shù)增加時,電磁屏蔽服裝的屏蔽效能會相應(yīng)降低。但是,當(dāng)孔的個數(shù)為2—4個時,電磁屏蔽服裝的屏蔽效能因紐扣孔個數(shù)的變化不太明顯。縫隙長度一定,寬度變大時,服裝的屏蔽效能隨之降低,縫隙寬度在1mm以內(nèi)時,縫隙的寬窄對服裝整體的屏蔽效能影響不大,縫隙寬度在1mm—2mm之間時,服裝整體的屏蔽效能降低,但服裝屏蔽效能因縫隙寬度的變化不太明顯�？p隙寬度超過2mm以后,屏蔽效能又開始顯著降低。因此,在設(shè)計電磁屏蔽服裝時,掌握孔洞大小、個數(shù)和間距以及縫隙的寬度對電磁屏蔽服裝屏蔽效能的有效影響區(qū)間,通過控制紐扣孔的長寬比,間距,個數(shù)以及縫隙的寬度可以更加靈活合理的設(shè)計電磁屏蔽服裝的結(jié)構(gòu)。
[Abstract]:With the rapid development of science and technology, all kinds of electronic equipment not only bring convenience to people's life, but also threaten people's health at all times. In order to effectively protect human health from the influence of electromagnetic radiation, electromagnetic shielding clothing began to enter people's field of vision, and has become a hot spot in the research of electromagnetic protective equipment. However, in order to meet the serviceability, there will be some holes or seams in the process of manufacture, which affects the overall shielding effectiveness of electromagnetic shielding clothing to a certain extent, and the electromagnetic shielding clothing shielding effectiveness test can only be measured in a certain frequency range because of the limitations of the experimental site and equipment, and can not cover all the cases. Therefore, in this paper, the shielding effectiveness of electromagnetic shielding clothing with holes and seams is simulated by means of electromagnetic simulation software, in order to obtain the influence of the size, number and spacing of holes and the width of seams on the shielding effectiveness of electromagnetic shielding clothing in a wider frequency range. In this paper, the female mannequin model is established firstly, and then the simulation experiment is carried out in the electromagnetic simulation software CST by using the inversion method according to the basic theory of electromagnetic shielding and the established mannequin, which proves the accuracy of the simulation method used in this paper. Then the simulation model of electromagnetic shielding clothing with holes and seams is established, and the shielding effectiveness of electromagnetic shielding clothing with different holes and seams is calculated. Finally, the simulation results are analyzed, and the influence of different holes and seams on the shielding effectiveness of electromagnetic shielding clothing is obtained. The simulation results show that the size, spacing and position of the holes and the width and narrowing of the gap have a certain influence on the shielding effectiveness of the electromagnetic shielding garment. When the area difference of the two rectangular button holes is within 10mm2, the rectangular holes with small aspect ratio have less influence on the shielding effectiveness of the clothing. When the distance between button holes is within 10mm, the shielding effectiveness of clothing will be obviously affected. When the distance between button holes is higher than 20mm, the shielding effectiveness of clothing will be reduced, but the spacing of button holes will no longer affect the shielding effectiveness of clothing. When the number of button holes increases, the shielding effectiveness of electromagnetic shielding clothing will be reduced accordingly. However, when the number of holes is 2 鈮，

本文編號：2505331