开发了一种电磁屏蔽砂浆。研究了材料厚度对屏蔽效能的影响、羟丙基甲基纤维素对砂浆建材性能的影响。结果显示,样块厚度达到1.5 cm时,其屏蔽效能超过30 d B;加入0.1wt%的HPMC,即可使砂浆的保水率达到94.2%。将此种材料应用于建筑物的...开发了一种电磁屏蔽砂浆。研究了材料厚度对屏蔽效能的影响、羟丙基甲基纤维素对砂浆建材性能的影响。结果显示,样块厚度达到1.5 cm时,其屏蔽效能超过30 d B;加入0.1wt%的HPMC,即可使砂浆的保水率达到94.2%。将此种材料应用于建筑物的电磁屏蔽,建筑物墙体的屏蔽效能可达40 d B。展开更多
In this paper,a 3D upstream finite element method is developed to analyze the ionized electric field around the UHVDC transmission lines including the building near it.The ionized electric field around the building is...In this paper,a 3D upstream finite element method is developed to analyze the ionized electric field around the UHVDC transmission lines including the building near it.The ionized electric field around the building is reduced due to the shielding effect of the building and the shielding distance is about three times its height.The ionized electric field including the human body model on the building and away from the building is also taken into account.The ionized electric field distortion ratio of the human body model is discussed in this paper.The distortion ratios for the positions on the building are less than those on the ground.展开更多
基金supported by the Key Project of the National Natural Science Foundation of China(Grant No.51037001)the National Basic Research Program of China("973"Program)(Grant No.2011CB209401)
文摘In this paper,a 3D upstream finite element method is developed to analyze the ionized electric field around the UHVDC transmission lines including the building near it.The ionized electric field around the building is reduced due to the shielding effect of the building and the shielding distance is about three times its height.The ionized electric field including the human body model on the building and away from the building is also taken into account.The ionized electric field distortion ratio of the human body model is discussed in this paper.The distortion ratios for the positions on the building are less than those on the ground.
