中文摘要：

当高温超导体处于超导态，永磁体的部分磁力线进入到超导体内，由于磁通钉扎的作用，永磁体无需控制而稳定悬浮，这种悬浮特性具有无源自稳定的特性，因此备受关注．本文研究圆柱形YBCO超导块材与永磁体在场冷和零场冷时的悬浮特性，并采用磁通冻结一镜像模型对其悬浮力进行数值计算．磁偶极子及其镜像采用电流环等效方式．对实验结果与数值计算结果进行比较，并分析了误差产生的原因．

英文摘要：

When the high-temperature superconductor obtains the superconducting state, part of the magnetic flux lines enter into the superconductor and the permanent magnet can be levitated stably without control due to flux pinning effect. This levitation characteristic is passive self-stability, so it attracts broad attention. The levitation characteristics between the cylindrical YBCO superconductor and the permanent magnet were studied in field cooling and in zero-field cooling. The frozen-image model was used to calculate the levitation force. The calculation results were compared with the experiment results, and the causes of error were analyzed.