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基于Ampère环路定律和Bean临界态模型,通过分析超导体内部屏蔽电流穿透深度的变化,考虑高温超导悬浮系统的强磁滞特性和磁化历史,讨论了系统的磁刚度.针对实验和计算方法中与磁刚度密切相关的小滞回距离选取标准展开讨论,给出了合理的小滞回距离范围;指出磁刚度曲线具有明显的滞回性质,这主要源于超导悬浮系统的磁滞特性;详细讨论系统物理与几何参数(如临界电流密度、超导体厚度和半径等)对磁刚度的影响.计算结果可以为高温超导悬浮系统的稳定性设计提供有效可行的方法和参考依据.
Based on Ampère’s loop law and Bean’s critical state model, the magnetic susceptibility of the system is discussed by analyzing the change of the shield current’s penetration depth and considering the strong hysteresis characteristic and history of the HTS suspension system.According to the experimental and computational methods In the magnetic hysteresis is closely related to small hysteretic distance selection criteria to start the discussion, gives a reasonable range of small hysteresis distance; pointed out that the magnetic hysteresis curve has obvious hysteresis properties, mainly due to the hysteresis characteristics of the superconducting suspension system The effect of system physics and geometrical parameters (such as critical current density, superconductor thickness and radius) on the magnetic stiffness is discussed in detail.The calculated results can provide an effective and feasible method and reference for the stability design of HTSC suspension system.