Screening currents and their effect on the magnetic field and strain state have been shown to be a major problem in the design and operation of rare-earth-barium-copper-oxide magnets, distorting the field and rotating the conductor to potentially large strains. The latter is a possible catalyst for damage as both plastic deformation and degradation of the critical current leading to reduced fatigue life or even catostrophic failure. Due to the nonlinear dynamic behavior of the screening currents and the significant possible rotation, including this rotational effect in the electromagnetic state requires a new addition to the existing models. The effect of the changing rotation angle of the conductor on the electromagnetic and stress state is investigated by using a modified homogeneous T–A method. Numerical results are compared with experimental tests.

屏蔽电流及其对磁场和应变状态的影响已被证明是稀土钡铜氧化物磁体设计和操作中的主要问题，会扭曲磁场并将导体旋转到潜在的大应变。后者可能是损坏的催化剂，因为临界电流的塑性变形和退化都会导致疲劳寿命缩短甚至灾难性故障。由于屏蔽电流的非线性动态行为和可能的显着旋转，在电磁状态下包括这种旋转效应需要对现有模型进行新的添加。通过使用改进的均质T-A研究了导体旋转角度变化对电磁和应力状态的影响方法。数值结果与实验测试进行了比较。