高温超导环向场D型磁体的应力分析  

Stress analysis of a HTS toroidal-field D-type magnet

作　　者：刘豪[1] 唐跃进[1] 张意[1] 邓序之 任丽[1] 

机构地区：[1]华中科技大学强电磁工程与新技术国家重点实验室、超导中心,武汉430074

出　　处：《低温与超导》2014年第9期34-37,92,共5页Cryogenics and Superconductivity

基　　金：国际热核聚变实验堆(ITER)计划专项(2011GB113004)资助

摘　　要：高温超导磁体通常具有高磁场、大电流密度的特点,其线圈和支撑结构均会受到较大的电磁力作用,为了判断线圈的稳定性及支撑结构的可靠性,必须对磁体的机械特性进行研究。通过有限元分析的方法,对额定通流226A、储能5.56kJ的高温超导环向场D型磁体的应力特性进行了分析。结果表明,线圈上的最大环向应力及内、外支撑结构上的最大Von Misses应力均分布在靠近磁体中心线的部位,整体的最大形变出现在线圈直线段的中部,这些区域被称为最容易损坏的危险区域。基于分析结果,提出了用以降低磁体因受电磁力损坏的风险的强化方案。HTS magnets usually have characteristics of high magnetic field and large current density, which will produce tremendous electromagnetic （EM） force in both the coils and the supporting structure. Thus the mechanical behavior of the magnet must be studied in order to verify the stability of the coils and the reliability of the support. In this paper, the FEM analysis was adopted to analyze the stress characteristic of an HTS toroidal -field D -type magnet with the rated current of 226A and the ener- gy storage capacity of 5.56kJ. The results show that the maximum values of the coils＇ toroidal stress as well as the inner and outer support＇s Von Mises stress are both in parts near to the centerline of the magnet. The maximum deformation appears in the middle part of the liner section of the coils. Those parts are called danger area that is most vulnerable to damage. Based on the resuits some strengthening methods were put forward to decrease the risk of damage brought by the EM force to the magnet.

关 键 词：高温超导 D型磁体 电磁力 强化 

分 类 号：TM26[一般工业技术—材料科学与工程]