摘要
采用复合树脂浸渍是提高超导储能磁体机械稳定性的有效手段之一,但是固化工艺条件会产生机械热应力,经复合树脂浸渍的超导磁体在预冷过程和通电运行过程中也会产生机械热应力或电磁力。为了分析储能磁体受力情况,本文通过COMSOL有限元软件建立储能磁体模型,研究磁体绕制过程中热应力和运行过程中电磁力对磁体结构应力应变的影响。结果表明,浸渍固化工艺过程中超导带材最大形变为0.23%,热应力没有对超导带材造成不可承受的损伤;在低温预冷过程中复合树脂最大形变2%,可为超导线圈提供一定预应力;在电磁力与热应力耦合作用过程中,超导带材最大形变0.017%,超导磁体的力学稳定性没有被破坏。
Epoxy resin impregnation is one of the effective ways to improve the mechanical stability of superconducting energy storage magnet. But the curing process conditions will produce mechanical thermal stress,and the magnet in the pre-cooling process and working process will also produce thermal stress or electromagnetic force. Toimprove the mechanical stability of the superconducting energy storage magnet,it is necessary to calculate the strains and stresses on energy storage magnet. The COMSOL finite element analysis software is used to build the energy storage magnet model,and the influence on magnet structure could be analyzed accurately,which were caused by thermal stress and electromagnetic force. The results suggest that the superconducting tape maximum deformation is of 0. 23% and the thermal stress does not damage the superconducting tape under the curing process. The epoxy resin maximum deformation of 2% can provide prestress for the superconducting tape in the pre-cooling process.After the coupling analysis of the electromagnetic force and the thermal stress,it shows that superconducting tape maximum deformation is 0. 017% and the mechanical stability of the superconducting magnet has not been destroyed.
作者
李振明
陈铮
谢凯
耿国丽
舒航
方进
丘明
LI Zhen-ming CHEN Zheng XIE Kai GENG Guo-li SHU Hang FANG Jin QIU Ming(Energy Storage and Novel Technology of Electrical Engineering Department, China Electric Power Research Institute, Beijing 100192, China School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044,China)
出处
《电工电能新技术》
CSCD
北大核心
2017年第11期14-20,共7页
Advanced Technology of Electrical Engineering and Energy
基金
国家电网公司科技项目(DG71-15-011)
关键词
超导储能磁体
有限元仿真
应力应变
环氧树脂
superconducting energy storage magnet
finite element simulation
stress and strain
epoxy resin
