摘要
The shielding property of cylinder with circular, square, and equilateral triangle holes was investigated by finite element analysis(FEA). The hole area(S_(hole)) plays an important role in magnetic circuit on the surface of cylinder. When Sholeis less than the critical area(S_(H)), cylinder with three shapes of holes obtained the same remanent magnetization inside,indicating that the shielding property is unaffected by the shape of the hole. Hence, high-permeability material is the major path of the magnetic field. On the condition of S_(hole)> S_(H), the sequence of the shielding property is equilateral triangle >square > circular, resulting from magnetoresistance of leakage flux in air dielectric. Besides, the anisotropy of shielding property caused by hole structural differences of the cylinder is evaluated. We find that a good shielding effectiveness is gained in the radial direction, compared with the axis direction. This research focuses on providing a theoretical support for the design of magnetic shield and improvement on the magnetic shielding ability.
作者
Si-Yuan Hao
Xiao-Ping Lou
Jing Zhu
Guang-Wei Chen
Hui-Yu Li
郝思源;娄小平;祝静;陈广伟;李慧宇(Key Laboratory of the Ministry of Education for Optoelectronic Measurement Technology and Instrument,Beijing 100192,China;Beijing Laboratory of Optical Fiber Sensing and System,Beijing Information Science&Technology University,Beijing 100016,China;Beijing Key Laboratory of Optoelectronic Measurement Technology,Beijing Information Science&Technology University,Beijing 100192,China)
基金
supported by the Key Projects of the National Natural Science Foundation of China(Grant No.51535002)
the Programme of Introducing Talents of Discipline to Universities(Grant No.D17021)。
