磁疗用球形永磁磁源空间磁场有限元数值计算方法

目的：研究球形永磁磁源空间磁场不同参数的量值和分布，为定量使用球形永磁磁源提供多参数计算依据。方法：采用有限元数值法计算得出的球形永磁磁源空间磁场的矢量磁位、磁感强度、磁场能量密度量值和空间分布图，并计算绘出磁力线和磁感强度等值线。结果：球形永磁磁源空间磁场的矢量磁位、磁感强度和磁场能量密度均随距磁源距离的增加而快速下降；磁感强度等值线和磁力线更直观地描述了磁场的变化。结论：建立磁源空间磁场计算方法对于更准确地进行磁疗定量研究是非常必要的。

The Finite Element Method on Space Fields of Spherical Magnets Applying to Therapy

Objective:To study the space fields of spherical magnets to provide calculated basis for quantitative use of spherical magnets in different parameters.Methods:The finite element method was used to calculate the values and space graphics of magnetic vector potential,magnetic induction,magnetic energy density on spherical magnet.Results:Magnetic vector potential,magnetic induction and magnetic energy density of spherical magnet decline rapidly with increasing distance from the magnetic source.in all derections.Magnetic induction isolines and magnetic force lines described the changes of magnetic fields in distinct.Conclusions:It was necessary to establish computing methods on space fields of magnets for more accurate quantitative research of magnetic therapy.