油管缺陷参数对漏磁场的影响分析  

Analysis of the Effect of Defect Parameters on MFL in Oil Tube

作　　者：蹇清平[1] 赵江 王斌 张攀[1] 艾志久[1] 

机构地区：[1]西南石油大学机电工程学院,四川成都610500 [2]金牛工程建设有限责任公司,新疆克拉玛依834000

出　　处：《管道技术与设备》2013年第4期15-17,29,共4页Pipeline Technique and Equipment

摘　　要：铁磁构件缺陷参数对漏磁场的影响较复杂,磁荷模型在理论上可以定量分析该磁场问题,但只能适用于简单缺陷形状情况。因此,采用有限元数值计算技术更具灵活性。为了进一步分析油管缺陷参数对漏磁场的影响,建立了油管缺陷漏磁场仿真模型,研究了裂纹深度、裂纹宽度、裂纹深宽比、裂纹倾角对漏磁场的影响。分析结果表明:漏磁场强度随油管缺陷裂纹宽度的减小或裂纹深度、裂纹角度的增加而增强;对于深度比,相对于裂纹宽度,裂纹深度对漏磁场的影响更明显。仿真结果为缺陷检测系统设计和缺陷信号分析提供了参考。The effects of ferromagnetic component defect parameters on the leakage magnetic field is more complex.The magnetic charge model can help in theory conduct a quantitative analysis of the magnetic field,but it only can be applied to the situation of a simple defect shape.So,the use of the finite element numerical computing technology is more flexible.In order to further analyze pipleine defect parameters on the leakage magnetic field,the defect magnetic flux leakage field simulation model was created,the effects of the defect depth,the defect width,the ratio of the depth and the width,the crack angle on the magnetic flux leakage field has been studied.The analytic results indicates that with the decrease of the width,the increase of the depth and the crack angle of tubing defects,the strength of the leakage magnetic field is also enhanced.Compared with the width,the effects of the defect depth on the magnetic flux leakage field is most obvious.The simulation results provides a guiding role for the defects detection system design and a defect signal analysis.

关 键 词：缺陷 有限元 漏磁场 油管 

分 类 号：TG115[金属学及工艺—物理冶金]