Research on the Analytical Model of Improved Magnetic Flux Leakage Signal for the Local Stress Concentration Zone of Pipelines.
Research on the Analytical Model of Improved Magnetic Flux Leakage Signal for the Local Stress Concentration Zone of Pipelines.
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DOI：
10.3390/s22031128
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发表时间：
2022-02-02
期刊：
影响因子：
--
通讯作者：
Su Y
中科院分区：
文献类型：
--
作者：
Yang L;Zheng F;Huang P;Bai S;Su Y
局部应力集中对管道的安全运行构成重大危害。然而，经典的漏磁信号解析模型仍无法有效地定量分析和准确评价管道局部应力集中区。本文基于磁力效应的Jiles-Atherton模型，引入了磁滞条件下铁磁材料应力与磁化强度之间的数学关系，建立了一种改进的基于磁力效应的漏磁信号解析模型。计算分析了应力强度对管道局部应力集中区漏磁信号的影响规律，并通过实验对理论计算结果进行了验证。仿真和实验结果表明，考虑磁滞条件，应力引起铁磁材料磁滞回线的变化，材料的磁化强度随应力的增大而减小;当外加磁场约为5 KA/m时，应力对铁磁材料磁化强度的影响最为明显。管道局部应力集中区表面的漏磁信号发生突变，管道泄漏信号的轴向幅值和径向峰峰值的变化量随着局部应力集中区应力强度的增大而趋于增大。与经典的漏磁信号分析模型的对比表明，改进的漏磁信号分析模型更适合于管道局部应力集中区的定量研究。
Local stress concentrations pose a significant hazard to the safe operation of pipelines. However, the classical analytical model of the magnetic flux leakage (MFL) signal is still unable to effectively quantitatively analyze and accurately evaluate the local stress concentration zone of a pipeline. In this paper, based on the Jiles–Atherton model of the magnetomechanical effect, the mathematical relationship between stress and the magnetization of ferromagnetic material under hysteresis conditions is introduced, and an improved analytical model of the MFL signal based on the magnetomechanical model is established. The influence law of stress intensity on the MFL signal in the local stress concentration zone of the pipeline is calculated and analyzed, and the theoretical calculation results are verified through experiments. Simulation and experimental results show that, considering the hysteresis condition, the stress causes a change in the hysteresis loop of the ferromagnetic material, and the magnetization strength of the material decreases with increasing stress; the effect of stress on the magnetization strength of ferromagnetic materials is most obvious when the external magnetic field is approximately 5 KA/m. The MFL signal on the surface of the local stress concentration zone of the pipe changes abruptly, and the amount of change in the axial amplitude and radial peak-to-peak value of the leakage signal of the pipe tends to increase with the increase in the stress intensity of the local stress concentration zone. A comparison of the analysis with the classical analytical model of the MFL signal shows that the improved analytical model of the MFL signal is more suitable for the quantification study of the local stress concentration zone of the pipeline.
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影响因子：
2.1
作者：
PALANISAMY, R;LORD, W
通讯作者：
LORD, W
影响因子：
1
作者：
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通讯作者：
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DOI：
10.1177/1475921719877361
发表时间：
2019-09-30
影响因子：
6.6
作者：
Liu, Bin;Ma, Zeyu;Xu, Xiaobei
通讯作者：
Xu, Xiaobei
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影响因子：
1
作者：
Wu De-Hui;Liu Zhi-Tian;Su Ling-Xin
通讯作者：
Su Ling-Xin
影响因子：
1
作者：
Chen, L;Que, PW;Jin, T
通讯作者：
Jin, T