管道裂纹的电磁激励红外热像无损检测数值模拟研究  

Numerical simulation of non-destructive testing of pipe crack by electromagnetically stimulated infrared thermography

作　　者：高聚春[1] 李国华[1] 马亚坤[1] 林晓凤[1] 张侨[1] 

机构地区：[1]中国矿业大学(北京)机电与信息工程学院,北京100083

出　　处：《矿山机械》2012年第11期104-109,共6页Mining & Processing Equipment

基　　金：国家自然科学基金资助项目(51075388)

摘　　要：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 study significance and basic principle of non-destructive testing by electromagnetically stimulated infrared thermography were presented. ANSYS was applied to build the model of the pipe and the crack. Moreover, voltage of 60 V and frequency of 100 kHz was applied onto the model with the equivalent resistance of the coil being 1 Ω according to electromagnetic thermal coupling analysis theory. Induction heating was simulated by altering the crack length, width, depth and coil lifting height, and then the maximum surface tem- perature difference and the optimal inspection duration were obtained. The study offered judgement criterion for numerical simulation of non-destructive testing of pipe crack by electromagnetically stimulated infrared thermography.

关 键 词：红外热像 无损检测 感应加热 数值模拟 有限元分析 

分 类 号：TG115.28[金属学及工艺—物理冶金]