摘要
基于有限元分析方法,利用ANSYS软件模拟对含有典型圆形缺陷的管道内表面进行电磁感应加热,建立了电磁-热耦合有限元模型,通过数值仿真计算得到了管道内表面热生成率的分布图,分析了电流频率、提离高度、输入电流密度这三个主要的热激励参数的变化对加热区域热生成率的影响关系。结果表明,随着感应加热线圈电流频率的增加,被加热工件表面最大热生成率近似呈线性增加;随着提离高度的增加,被加热工件表面的最大热生成率减小,且呈非线性关系;随着输入电流密度的增加,被加热工件表面的最大热生成率近似呈指数的形式增加;进行电磁感应加热时,被加热工件表面缺陷处的热生成率明显高于其他区域,这一特点将导致温度场分布的差异,利用这种差异可以提取并识别缺陷。
Based on the finite element analysis method, ANSYS software is used to simulate the inner surface of pipeline with typical circular defects by electromagnetic induction heating and the electromagnetic-thermal coupling finite element model is established. The heat generation rate distribution on the inner surface of the pipeline is calculated by numerical simulation. The influence of the change of the three thermal excitation parameters which includes current frequency, lift off height and input current density on the heat generation rate in heating zone is analyzed. The results show that with the increase of the current frequency of the induction heating coil, the maximum heat generation rate on the heated industrial part surface increases approximately linearly. As the input current density increases, the maximum heat generation rate on the heated industrial part surface increases approximately exponentially. When electromagnetic induction heating is applied, the heat generation rate of surface defects on the heated industrial part is obviously higher than that of other areas. This feature will result in the difference of the temperature field distribution. Using this difference, the defects can be extracted and identified.
作者
张懿
张云伟
樊阳阳
苟爽
ZHANG Yi;ZHANG Yun-wei;FAN Yang-yang;GOU Shuang(Faculty of Information Engineering and Automation,Kunming University of Science and Technology,Kunming Yunnan 650500,China)
出处
《软件》
2018年第5期22-26,共5页
Software
基金
国家基金项目:城市地下煤气管网检测机器人队列协作与控制研究(51365019)
关键词
管道缺陷
电磁-热耦合
有限元分析
热生成率
Pipeline defect
Electromagnetic-thermal coupling
Finite element analysis
Heat generation rate
