项目名称： 超导体力电特征及电磁行为可调性的研究

项目编号： No.11472120

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 数理科学和化学

项目作者： 雍华东

作者单位： 兰州大学

项目金额： 75万元

中文摘要： 由超导体构成的超导磁体具有常规磁体材料不具备的优越性能，随着大规模实用化超导体研究的不断发展和深入，超导磁体的应用范围也越来越广。超导体在不断提升超导电性的同时，其力学行为也引起了研究人员的重视。超导体具有复杂的非线性力电行为，提升超导体力学和磁热稳定性以及实现力学载荷对超导体电磁行为的可调性有着重要的科学意义和应用价值。本项目拟展开以下几个方面的研究工作：(1)分析超导复合材料中的夹杂对其力学行为和电磁行为的影响，寻求增强超导体力学稳定性并提升超导体俘获场的优化夹杂分布；(2)探讨力电耦合条件下超导体中的磁通跳跃行为，揭示力学载荷对超导体磁热稳定性的影响及改善磁热稳定性的途径；(3)建立超导-铁磁结构中相互作用的理论模型并研究力学载荷与超导电磁行为的关系，实现超导电磁行为的力学载荷可调性；(4)借助理论计算和实验设计合理的磁隐形衣，探讨不同变形时磁隐形衣在非均均和时变磁场中的隐身效果。

中文关键词： 超导体；超导—铁磁结构；多场耦合；力电行为；磁隐形衣

英文摘要： The superconducting magnets which are composed of superconductors have superior properties which normal magnets do not possess. With the development of the superconductors which can be used in large-scale applications,the superconducting magnets have been applied in many applications. As the superconductivity keeps developing,the mechanical behaviour also attracts attention of the researchers. Superconductors have complex nonlinear electromechanical behavior. The investigations of improving mechanical and magneto-thermal stability of superconductors and realizing the tunability of electromagnetic behavior with mechanical loadings have important scientific significance and application value. This proposed project will study the following problems: (1) The effects of inclusions on the mechanical and electromagnetic behavior will be analyzed so that the optimized distribution of inclusions which enhances the mechanical stability and improves the trapped field can be obtained; (2) We aim to investigate the flux jump in the superconductors by considering the electromechanical coupling behavior, analyze the impact of mechanical loadings on the magneto-thermal stability and the approach to improve the magneto-thermal stability; (3) The theoretical model which can describe interaction between the superconductor and ferromagnet will be established, the relationship between the mechanical loadings and electromagnetic behavior in Superconductor-Ferromagnet structure is studied and the tunability of electromagnetic behavior with mechanical loadings is realized;(4) The structure which can achieve magnetic cloaking will be designed by means of theoretical calculations and experiments, and the effects of deformation on the invisibility of cloaking structure in non-uniform field and time varying field are discussed.

英文关键词： Superconductors;Superconductor-Ferromagnet structure;Multi-field coupling;electromechanical behavior;Magnetic cloaking