基于有限元数值模拟永磁轨道上方高温超导块材悬浮力

摘要

This paper presented a 3D - modelling numerical method using finite element method (FEM) to simulate the lev-itation force of high - temperature superconductors ( HTSC) above permanent magnetic guideway. The models were formulated with the magnetic field vector ( H - method). The electromagnetic properties of HTSC were described though Kim critical - state model. The current distribution in the bulk HTSC above the permanent magnetic guideway (PMG) was obtained using the proposed method. The magnetic levitation forces between the bulk HTSC and the PMG were calculated. Compared with the experimental results,the calculation results are agreed with the experimental results, which show that the method is validly to simulate the levitation force above permanent magnetic.%采用有有限元计算方法和有限差分法对高温超导块材电磁场进行模拟,计算了永磁轨道上方超导块材所受到的磁悬浮力.文中给出了一种基于有限元的3D-模型数值计算方法；模型采用了电磁场磁矢量法(H-方法)；模型中采用Kim模型来描述高温超导块材的临界电流密度Jc；采用E-J幂指数来描述超导块材的本构关系.该计算模型采用Fortran语言开发平台编写了有限元求解代码实现整个算法.最后通过实验方法验证该计算模型的有效性.