77K疲劳载荷下大型超导线圈尾段性能研究  

Study on the performance of the large superconducting coil tail under fatigue load at 77 K

作　　者：张之荣 叶俭文 王宇轩 修磊 邢文静 沈光[2] 沈浩宇 Zhang Zhirong;Ye Jianwen;Wang Yuxuan;Xiu Lei;Xing Wenjing;Shen Guang;Shen Haoyu(School of Advanced Manufacturing Engineering,Hefei University,Hefei 230601,China;Hefei Institutes of Physical Science,Chinese Academy of Science,Hefei 230031,China;Shandong Niuqianli Power Supply Technology Co.,Ltd,Zibo 256399,China)

机构地区：[1]合肥大学先进制造工程学院,合肥230601 [2]中国科学院合肥物质科学研究院,合肥230031 [3]山东牛千里电源科技有限公司,淄博256399

出　　处：《低温与超导》2025年第2期20-27,共8页Cryogenics and Superconductivity

基　　金：安徽省重点研发计划(2023z04020004,2022a05020043);国家级大学生创新创业训练计划项目(202311059009)资助。

摘　　要：极向场线圈尾段结构是CFETR聚变装置中的重要组成部位,通过焊接将线圈出线头和尾段结构进行连接。本文对不同焊接厚度的尾段结构进行了静力学和疲劳寿命仿真分析,得到了尾段结构应力分布和疲劳寿命的仿真结果。同时完成对尾段结构3万次的77 K下疲劳载荷实验(60~600 kN,4 Hz),并将其与仿真结果进行对比分析。结果表明:尾段结构在焊接厚度为10 mm时具有较佳的力学性能,能够满足CFETR对线圈尾段结构的要求。该研究可为未来大型聚变装置极向场线圈尾段结构设计提供一定参考价值。The tail structure of the polar field coil is an important part of the CFETR device,and the coil outlet head is con-nected with the tail by welding.In this paper,the static and fatigue life simulation analysis of the tail with different welding thickness was carried out,and the simulation results of the stress distribution and fatigue life of the tail were obtained.At the same time,it was carried out that the fatigue test with the load of 60~600 kN for 30000 cycles at 77 K and 4 Hz,and the com-parison and analysis were made with the simulation results.The results show that the tail has the best mechanical properties when the welding thickness is 10 mm,which can meet CFETR requirements.The research can provide some reference value for the structure design of the polar field coil tail in future large-scale fusion devices.

关 键 词：超导磁体 尾段 低温疲劳 焊接应力 

分 类 号：TM26[一般工业技术—材料科学与工程]