中文摘要：

研究了空心圆柱线圈激励下三层同心导电球模型的瞬态电磁场边值问题。通过时域有限元方程的求解获得头内矢量磁位，进而模拟了磁通密度、感应电场的分布及时域变化特性。为进一步探索脉冲电磁场对人脑的最佳刺激方式和新型磁刺激仪器的研制提供理论基础。

英文摘要：

A theoretical study on the boundary value problem of pulse electromagnetic field in the concentric three-shell spherical volume conductor model produced by the cylindrical coil is given. The numerical solution of the pulse magnetic flux density, induced electrical field are derived by the finite element method. Meanwhile, the distribution of the magnetic flux density, induced current for the cylindrical coil, and the change of them in time domain axe analyzed. The results provide some preliminary theoretical foundation for the further research on the optimum methods and mechanism of the transcranial magnetic stimulation.