含贯通导体腔体电磁耦合的混合计算模型（英文）

For studying the coupling effect of electromagnetic irradiation to rectangular enclosure with wire penetration,a new hybrid model is proposed to determine the shielding effectiveness of the enclosure.This model based on rectangular-enclosure equivalent circuit regards the penetrating wire as a monopole antenna,and the frequency-domain results of calculation using this model match with that of computer simulation technology(CST)Microwave Studio.Meanwhile,this new model requires far less computation than traditional methods:3 s for one sample on an average personal computer.Based on the presented model,the relationships between enclosure volume,external length of wire penetration,internal length of wire penetration,and shielding effectiveness are analyzed.In the frequency range from 100 MHz to1 000 MHz,when keeping the length of penetrating wire unchanged,the shielding effectiveness of an enclosure at its center point increases with the cavity volume.There is no obvious effect from the external length of penetrating wire on the shielding effectiveness.If the external length of a penetrating wire is 8 cm unchanged,the shielding effectiveness of the penetrated enclosure at its center point declines with the increase of internal length of the penetrating wire.     

126kV的GIS母线筒外壳应力分析

本文针对西开厂和三菱两种母线筒的设计方案,采用应力集中理论和有限元理论分别对简壁开口处应力较为集中的部分进行了分析计算,两者所得结果基本吻合,为该部件的设计提供了可靠的理论根据。     

满足工艺品剪切要求的二维不规则排料算法

主要研究在矩形铁皮原材料上排放若干种二维不规则工艺品零件。对零件轮廓矢量图进行分类,采用形心重合定位填充算法对不规则图形进行组合,然后使用对排、单排、改进型的最低水平线排料策略,在满足“一刀切”的工艺品剪切要求和同种规格零件尽量放在一起的前提下,尽量提高原材料的利用率。实验结果表明排料算法的原材料利用率较高,同时满足剪切工艺要求。     

快速预测干扰下斜开孔腔体屏蔽效能的模型

提出一种针对复杂干扰下斜开孔金属腔体屏蔽效能的计算模型。该模型可快速精准地计算出任意金属材料腔体,任意开孔位置,任意观测点位置,任意入射、极化平面波照射以及斜开孔阵腔体的屏蔽效能。首先依据磁流原理和镜像原理将斜开孔腔体等效为两个水平开孔腔体,然后基于Robinson的等效电路法分别求解各自的屏蔽效能,再利用公式换算求得斜开孔金属腔体的屏蔽效能。随后针对腔体会面临的不同干扰,给出不同情况下屏蔽效能的计算方法。考虑多种干扰叠加的复杂工况,将该模型利用Matlab 进行编程,并将计算结果同全波仿真软件CST中的时域传输线矩阵法和频域有限元法的仿真结果进行对比,验证了所提模型的可行性。该模型在保证计算精度的同时,在计算效率上表现出极大的优势。