华西口腔医学杂志

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钢帽式磁性附着体的二维磁场有限元分析模型的建立

林丽红,赵铱民,顾捷,梁得亮   

  1. 710031 第四军医大学口腔医学院修复科(林丽红, 赵铱民),西安交通大学(顾捷,梁得亮)
  • 收稿日期:2002-10-25 修回日期:2002-10-25 出版日期:2002-10-20 发布日期:2002-10-20
  • 基金资助:

    本课题为第四军医大学创新项目(编号CX01A001)和军队科研项目(编号01MA196)资助项目

Establishment of Two-dimensional Magnetic Field Finite Element Analysis Model of Cup-yoke-type Magnetic Attachment

Lin Lihong, Zhao Yimin, Gu Jie, Liang Deliang   

  1. Lin Lihong, Zhao Yimin The College ofStomatology, Fourth MilitaryMedicalUniversity Gu Jie, Liang Deliang Xican JiaotongUniversity
  • Received:2002-10-25 Revised:2002-10-25 Online:2002-10-20 Published:2002-10-20

摘要:

目的:建立钢帽式磁性附着体的二维磁场有限元分析模型,实现磁性附着体的优化设计。方法:钢帽式磁性附着体为轴对称稳定场,所以可对其断面的1/2进行二维磁场分析。通过有限元法积分作用于闭路磁体与衔铁之间的麦克斯韦应力,算得磁性附着体的固位力。结果:通过程序计算值与实测固位力值之间的比较,发现本程序较真实地反映了磁性附着体各因素变化对固位力的影响趋势,而计算值比实测法所得的固位力值小10%左右。结论:此程序可用于钢帽式磁性附着体的磁场计算。

关键词: 磁性附着体, 有限元, 磁场计算

Abstract:

Objective:The purpose of this study was to establish two-dimensional magnetic field finite element analysis model of cup- yoke-type magnetic attachment for optimizing the design of magnetic attachments.Methods:Because the magnetic field of cup- yoke-type magnetic attachment is stable axial-symmetrical, the authors only analyzed two-dimensional magnetic field of 1/2 sec- tion. The Maxwell stress betweenmagnet and keeperwas integral analyzed using the finite elementmethod, and the attractive force between magnetic attachments was obtained.Results:Compared the value of calculated attractive force with that of examined, the authors found that the procedure veritably reflected influencing trend of variable factors on attractive force, and the value of former one was 10% less than the laterone.Conclusion:This procedure can be used inmagnetic field calculation of cup-yoke-type mag- netic attachments.

Key words: magnetic attachment, finite element method, magnetic field calculation