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介绍了电磁激励红外热像无损检测的研究意义及基本原理。应用ANSYS有限元分析程序建立管道和裂纹模型,根据电磁热耦合分析原理,施加60V的激励电压,100kHz的频率,线圈等效电阻为1Ω,并通过改变裂纹的长度、宽度、深度和线圈提离高度,模拟感应加热的情况,从而得到最大表面温差和最佳理论检测时间长度等缺陷的可检测规律,为管道的电磁激励红外热像无损检测的数值模拟研究建立统一的评判依据。
The research significance and basic principle of electromagnetic excitation infrared thermography non-destructive testing are introduced. The pipeline and crack model are established by ANSYS finite element analysis program. According to the theory of electromagnetic and thermal coupling, excitation voltage of 60V and frequency of 100kHz are applied, the equivalent resistance of the coil is 1Ω, and by changing the length, width, depth and coil lift of the crack Heights and simulations of induction heating, and the maximum detectable surface temperature difference and the optimal length of theoretical detection time were obtained. The unified evaluation criteria were established for the numerical simulation of non-destructive testing by electromagnetic excitation of pipelines.