关键词: 磁弹性耦合, 几何非线性, 导电薄板, 面内磁体力, 动态响应

Abstract: For the limiter blade in fusion reactor under the complicated magnetic field, a cantilever conductive thin plate was employed as its simplify structure，and a theoretical model was established to describe the dynamic response behavior of geometric nonlinearity under the condition of mechanics-electricity-magnetism interactions based on electromagnetic and mechanical basic laws and equations of conductive media. The solving processes for numerical calculation were given, and the influences of in-plane magnetic volume forces and geometric nonlinearity on the deformation of thin plate were quantitatively simulated. The simulation results indicate that it is not necessary to take in-plane magnetic volume forces and the deformation into account under the condition of fairly small transverse magnetic field while their effects are more obvious with the increase of transverse magnetic field, and that the deflection peak with geometric nonlinearity is smaller than that from linearity. Therefore, the effects of geometric nonlinearity and in-plane magnetic volume forces are synchronously considered in the conductive structure design.

Key words: Magnetoelastic interaction, Geometric nonlinearity, Conductive thin plate, In-plane magnetic volume forces, Dynamic response