【摘要】 悬浮力是高温超导磁悬浮列车运行中的一个至关重要的参数.悬浮力的弛豫特性是高温超导磁悬浮列车安全运行的一大阻碍.适度降低工作温度是有效改善悬浮力弛豫特性的有效手段之一.本文从数值计算和实验两个层面研究了不同冷却温度和不同场冷间隙下的悬浮力的弛豫现象.发现悬浮力的弛豫现象随着超导块冷却温度的降低而减弱，随着场冷间隙的增大而略微增大，但是随着冷却温度的降低，增大程度会有所减弱.该研究有助于通过合理设计高温超导材料工作温度，以提高磁悬浮系统性能表现.更多还原

【Abstract】 Suspension force is an important parameter in the operation of high temperature superconducting maglev train. The relaxation property of suspension force is a major obstacle to the safe operation of high temperature superconducting maglev train. Moderate reduction of operating temperature is one of the effective means to improve relaxation characteristics of suspension force effectively. In this paper, the relaxation phenomena of suspension forces under different cooling temperatures and different field cold gaps are studied numerically and experimentally. It is found that the relaxation phenomenon of suspension force weakens with the decrease of superconducting block cooling temperature, and slightly increases with the increase of field cooling gap, but the increase degree weakens with the decrease of cooling temperature. The research is helpful to improve the performance of magnetic levitation system by rationally designing the working temperature of high temperature superconducting materials.更多还原