| 一种计算轴对称磁场的边界元—有限元混合法的研究 |
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| 引用本文： | 金伟其 方二伦 等. 一种计算轴对称磁场的边界元—有限元混合法的研究[J]. 北京理工大学学报, 1991, 11(4): 37-44 |
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| 作者姓名： | 金伟其 方二伦 等 |
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| 作者单位： | [1]工程光学系 [2]西安近代化学研究所 |
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| 摘 要： | 由静磁场的基本方程和有限元的原理出发，研究了一种新的计算带非饱和磁介质轴对称磁场的边界元－有限元混合法，编制了计算电磁聚焦成象系统聚焦磁场的程序，这种方法解决了单纯使用有限元法的边办封闭问题，为成像系统及其它磁透镜的工程设计提供了一种有效方法。
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| 关 键 词： | 电磁聚集成像系统 轴对称磁场 静磁场 磁透镜 光电成象器件 边界元－有限元混合法 计算 |
A Combined Boundary Element -Finite Element Method for Computing the Rotational Symmetrical Magnetic Field |
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| Jin Weiqi Zhou Liwei Ni Guoqiang. A Combined Boundary Element -Finite Element Method for Computing the Rotational Symmetrical Magnetic Field[J]. Journal of Beijing Institute of Technology(Natural Science Edition), 1991, 11(4): 37-44 |
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| Authors: | Jin Weiqi Zhou Liwei Ni Guoqiang |
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| Affiliation: | Jin Weiqi Zhou Liwei Ni Guoqiang (Department of Optical Engineering)Fang Erlun (Xi' an Research Institute of Modern Chemistry) |
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| Abstract: | Based on the fundamental equations of staticmagnetic field and the principle of finite element method, a new combined boundary element-finite element method for the computation of rotational symmetrical magnetic field with unsaturated iron medium is studied and a program for the design of electromagnetic focusing imaging systems drawn up. The methdd shows that the question of closed boundary, when using finite element method only can now be settled. It also shown . that the new method is very efficient for the engineering design of imaging systems, as well as for ordinary magnetic lenses. |
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| Keywords: | electron optics electron lenses finite element method boundary element method / cathode lenses |
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