Screening current rotation effects: SCIF and strain in REBCO magnets
Screening current rotation effects: SCIF and strain in REBCO magnets
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DOI：
10.1088/1361-6668/ac1525
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发表时间：
2021
影响因子：
3.6
通讯作者：
D. Kolb-Bond;M. Bird;I. Dixon;T. Painter;J. Lu;K. Kim;K. M. Kim;R. Walsh;F. Grilli
中科院分区：
文献类型：
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作者：
D. Kolb-Bond;M. Bird;I. Dixon;T. Painter;J. Lu;K. Kim;K. M. Kim;R. Walsh;F. Grilli
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-氧化物磁体的设计和操作中的主要问题，使场失真并使导体旋转到潜在的大应变。后者是一个可能的催化剂的损害，因为塑性变形和退化的临界电流导致疲劳寿命降低，甚至catostrophic故障。由于屏蔽电流的非线性动态行为和显著的可能旋转，包括电磁状态中的旋转效应需要对现有模型进行新的添加。采用修正的齐次T-A法研究了导体旋转角度变化对电磁场和应力状态的影响。数值结果与实验测试进行了比较。
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.