铸钢管道的电磁激励红外热像无损检测数值模拟研究  

Numerical simulation study on NDT of cast steel pipe by electromagnetically excited thermography

作　　者：方俊雅[1] 李国华[1] 高聚春[1] 胡宇[1] 林晓凤[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7期109-112,共4页Mining & Processing Equipment

基　　金：国家自然科学基金资助项目(51075388)

摘　　要：铸钢管道常用于石油化工工业中,无损检测是保障其质量的重要手段。为了减少无损检测的时间和成本,根据电磁热耦合分析原理,采用大型有限元分析软件ANSYS,对铸钢管道进行模拟仿真运算,通过改变电磁激励频率、激励电流强度和缺陷深度,得到缺陷表面的最大温差、缺陷可检测的持续时间、缺陷可检测的最大连续长度等缺陷规律检测,检测结果为铸钢电磁激励红外热像无损检测提供了有价值的参考。The cast steel pipe is often applied to petrochemical industry, and non-destructive testing has very important meaning in ensuring its product quality. According to the electromagnetic heat coupling analysis theory, a large-scale finite element analysis software ANSYS was used to conduct the simulation and calculation of the cast steel pipe so as to reduce the time and cost of non-destructive testing. The defect inspection laws such as the maximum temperature difference of defect surface, continuable defect inspec- tion duration, maximum detectable continuous defect length etc. was obtained by altering electromagnetic excited frequency, intensity of excited current and defect depth. The inspection results offered valuable ref- erences for non-destructive testing of cast steel pipe by electromagnetically excited thermography.

关 键 词：无损检测 感应加热 数值模拟 铸钢 有限元分析 

分 类 号：TU392.3[建筑科学—结构工程]