原子能科学技术2016，Vol.50Issue(9)：1537-1543,7.DOI:10.7538/yzk.2016.50.09.1537
非规则边界条件对介质内带电的影响研究
Study on Impact of Irregular Boundary Condition on Dielectric Internal Charging
摘要
Abstract
The three‐dimensional simulation of internal charging of complex dielectric structures can help to find the special charging point with distorted enlarged electric field due to irregular boundary condition .In this paper ,the three‐dimensional internal charging simulation was presented with experiment verification . A three‐dimensional simulation was performed to study the internal charging of a typical printed circuit board which is partly grounded on the front surface .The characteristics of electric field distor‐tion emerged on the edge of partly grounded areas were investigated ,and the quantita‐tive analysis was carried out considering the dependence of the fillet radius of the metal circuit corner on distorted peak electric field .Under the worst‐case of electron radiation environment in geostationary orbit ,the results from a 3 mm PBC with 2 mm aluminum shielding show that electric field distortion indeed exists just on the edge connecting grounding and insulation boundary areas .This distorted electric field can reach the level of 107 V/m ,which is about two orders larger in magnitude than that with uniformly grounding boundaries in one‐dimensional case .Enlarging the fillet radius of metal trace corner can reduce the leakage current collection around the grounding boundary ,so the peak electric field is reduced .These conclusions can be useful references in effectively diminishing the internal charging hazards of PCBs in a satellite .关键词
介质内带电/非规则边界条件/局部接地/三维仿真/场强畸变Key words
dielectric internal charging/irregular boundary condition/partly ground-ing/three-dimensional simulation/electric field distortion分类
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王松,唐小金,易忠,武占成,孙永卫..非规则边界条件对介质内带电的影响研究[J].原子能科学技术,2016,50(9):1537-1543,7.基金项目
国家自然科学基金资助项目 （）
