Finite Element Analysis Of Magnetic Force In Study Of Artificial Joint With Magnetic Suspension

With the development of our society, people has become more and more concerned to their quality of life. At the same time, the number of joint replacements has been increasing because of arthritis, sports injuries, aging and other factors. After all there are some differences between artificial joints and protogenetic joint, the artificial joint had a short service life because of its friction, for the purpose of prolong its service life we must decrease its friction. The writer would research the feasibility of suspension artificial joint furtherly and the choice law of the magnetic model on the base of Chen Qingshi's research in the paper.This paper still considered the simplified model of maglev joints, and doing the research by selecting the cylindrical, hemispherical and cylindrical shell-shaped model, at the same time comparing the results with Chen Qingshi and the latest experimental results. The study of this article comes from General Electromagnetic Theory and make use of Finite element method,at this situations, the model that we used and the result that we have are more consistent with the actual situation by using the maglev joints. This article also calculate repulsion between two magnets with different angles, it fully proofed the possibility use of maglev joints. Our results show that:the results of finite element method is much more accurate than the ideal magnetic circuit method; In the case of same permanent magnets, the amount of magnetic efficiency that have being made with the order of hemispherical, cylindrical and hollow cylindrical, especially when the curvature of the surface radius decreases close (1mm or so) of the magnetic force will decrease with the decrease with distance, which means that the selections of surface curvature of permanent magnets must be larger than one scale; In addition, with the increase of the angle opposite the permanent magnet, the repulsion at the Y direction have a greater reduction. Based on these results, we think we can create a true sense of the artificial maglev joints.