标题： 用于复合超导体传输电流均质化的降阶滞后通量模型 显示英文标题

标题： Reduced Order Hysteretic Flux Model for Transport Current Homogenization in Composite Superconductors

摘要： 在本文中，我们提出了简化的滞后通量（ROHF）模型，以描述复合超导体中时变传输电流与内部磁通之间的关系。 ROHF 模型通过导体响应的参考仿真进行参数化，之后可以在不需要详细电磁场解的情况下计算宏观量，如电压和功率损耗。 因此，它适用于大规模超导磁体中传输电流效应的均质化，避免对复合股线的小尺度结构进行精细离散化，从而大幅减少计算工作量。 该近似可以实现为（i）一种与速率无关的模型，忽略正常导电基体中的涡流效应，或者（ii）一种与速率相关的模型，包括这些涡流效应。 在本文中，完整的建模流程，包括参数识别、与其他场（温度和磁场）的耦合以及结果的后处理，均以一个扭曲的多丝股线为例进行了描述和验证。 显示英文摘要

摘要： In this paper, we present the Reduced Order Hysteretic Flux (ROHF) model to describe the relationship between time-varying transport current and internal magnetic flux for composite superconductors. The ROHF model is parametrized using reference simulations of the conductor response, after which it enables the computation of macroscopic quantities such as voltage and power loss without requiring detailed electromagnetic field solutions. It is therefore suitable for the homogenization of transport current effects in large-scale superconducting magnets, avoiding a fine discretization of the composite strand small scale structures, allowing to drastically reduce the computational effort. The approximation can be implemented either (i) as a rate-independent model, neglecting eddy current effects in the normal conducting matrix, or (ii) as a rate-dependent model, including those eddy current effects. In this paper, the complete modeling workflow, including parameter identification, coupling with the other fields (temperature and magnetic field), and post-processing of the results, is described and verified using a twisted multifilamentary strand as an example.