中文摘要：

根据脉冲涡流检测过程所涉及的涡流场和温度场理论,利用COMSOL4.4多物理仿真软件对金属铝材料进行缺陷检测仿真。分析了带有缺陷的铝材料表面的涡流和温度分布状况以及相关机理;并通过改变激励频率,观察不同激励频率下材料表面的温度分布变化,得出了激励频率对脉冲涡流加热的影响,从而选取合适的激励频率对金属材料进行加热检测。

英文摘要：

In this paper,the simulation model of detecting crack in aluminum material has been established based on the eddy current field theory and magnetic field theory.The problems of defect detecting in aluminum material were simulated by using the software of COMSOL4.4.The distribution and mechanism of eddy current and temperature near the surface of aluminum are analyzed.By observing the changing of the temperature near the surface with different frequencies,the research reveals that the relationship between excitation frequency of eddy current and the heating effect was found out and proper exciting frequency was used to heat the aluminum.Our research results have directive significance for nondestructive detecting.