【摘要】 分析了托卡马克装置中超导载流线圈磁体的电磁弹性动力学稳定性,运用超导线圈的磁通俘获理论导出了超导磁体中感应电流的表达式。基于Biot Savart定律、Lorenz定律以及曲梁弯曲理论,建立了反映超导载流线圈在强磁场中运动所产生感应电流影响的电磁弹性力学模型。通过三线圈超导磁体数值分析发现:受稳态电流作用时,线圈振动产生的感应电流很小,对电磁弹性力学的性能影响并不明显;但当超导磁体受到脉冲电流作用时,感应电流对超导磁体的动力稳定性具有明显的影响,使稳定参数区域变小。更多还原

【Abstract】 An analysis of the dynamic stability of the superconducting coils in tokamaktype fusion reactor has been performed, when the induced current and its effect on the dynamic stability have been taken into account from the theory of magnetism captured by the superconducting coil. Based on the theory of curved beams and the BiotSavart law, a theoretical model of the magnetoelastic interactions among the deformation of the coils, the electromagnetic force exerted on the coils and the induced current of the coils has been established. From the numerical analysis of a threecoil superconducting partial torus, it is found that the induced current due to the coil vibration is very small when a steady current is applied in the coil, therefore there is a little effect of the current on the mechanical behavior of the coil. When the structure is subjected to a transient electromagnetic force due to a rapid change of pulse current, the influence of induced current on the mechanical behavior becomes notable. That is to say, the range of magnetoelastic dynamic stability becomes smaller due to the induced current in the superconducting partial torus when pulse current is applied in the coils更多还原