管道内壁缺陷漏磁信号的ANSYS仿真与分析

漏磁探伤法所检测到的缺陷除了可能是内表面或外表面、纵向或横向这些属性之外，它还有分等级的问题，即可能是一个导致管道报废的缺陷，也可能是一个不影响使用的”合格”缺陷，这要求检测系统有自动识别的功能。以管道内表面缺陷作为研究对象，利用有限元分析软件作为仿真分析工具，对不同内表面缺陷所产生的漏磁信号进行仿真分析，仿真结果表明，不同缺陷所产生的漏磁信号不同，缺陷的参数与其所产生的漏磁信号的参数之间有一定的对应关系，通过大量的模拟仿真数据和实测数据可找出这种对应关系，从而为缺陷的鉴别和管道使用寿命的评价提供依据。

Analysis and Simulation on Magnetic Flux Leakage Signal of Flaw Inside Pipe Based on ANSYS

The flaws which the magnetic flux leakage(MFL) testing system can detect may exist in the inner or the outer surface. The character of flaw's direction may be lateral or vertical. Besides, different flaws must be classified because some may be dangerous and some may not. This reason needs the testing system to identify the flaw automatically. The flaw in the inner surface of pipe is discussed, and the MFL signal of the different flaws is simulated based on the finite element analysis (FEA) software. The simulation result shows that different flaws cause different signal. And the signal's parameters correspond with the flaw's parameters. The relation can be found by the comparison of software simulation and the detecting result. It provides proof to identify the flaw and evaluate the life-span of the pipe.