中国机械工程2025，Vol.36Issue(4)：830-839,10.DOI:10.3969/j.issn.1004-132X.2025.04.020
交变激励下钢轨表面裂纹的磁场畸变量重构
Reconstruction of Magnetic Field Responses Caused by Rail Surface Cracks with Alternative Current Excitation
摘要
Abstract
As the response laws of the perturbed magnetic field in ACFM to rail RCF crack mor-phology parameters remained unclear,a novel method was proposed for functional reconstruction be-tween the ACFM perturbed magnetic field and rail RCF crack parameters.The ACFM calculation models were established based on multiple field tests of surface length,ellipse ratio,and internal an-gle of RCF cracks in heavy-haul railway rails throughout their full life cycle.The perturbed magnetic field above RCF cracks with different parameters was numerically calculated using the ACFM model.The relationship between RCF crack parameters and the perturbed magnetic field was systematically analyzed.Through fitting and evaluation of the perturbed magnetic field's response to the spatial mor-phology parameters of RCF cracks,the functional expression of the response laws was reconstructed.The results demonstrate that the ACFM response to rail RCF crack parameters is synthetically charac-terized.The peak value of magnetic field x-component is observed to increase linearly with the surface length and nonlinearly with the internal angle of RCF cracks.Conversely,a nonlinear decrease may be identified as the ellipse ratio of RCF cracks increases.These variations are effectively described by pol-ynomial functions.The change rules between the perturbed magnetic field and RCF crack parameters may be functional reconstructed.The determination coefficient between the reconstructed results and the perturbed magnetic field is found to exceed 0.99,while the sum of squared errors(SSE)and root mean squared errors(RMSE)are constrained to less than 0.00115 and 0.003,respectively.关键词
钢轨/滚动接触疲劳/无损检测/交流电磁场检测/磁场响应Key words
rail/rolling contact fatigue(RCF)/non-destructive testing/alternative current field measurement(ACFM)/magnetic response分类
机械制造引用本文复制引用
王驰,周宇,翁之意..交变激励下钢轨表面裂纹的磁场畸变量重构[J].中国机械工程,2025,36(4):830-839,10.基金项目
国家自然科学基金(51878661) （51878661）
上海市科委项目(20dz1203100) （20dz1203100）
浙江省交通运输厅科技计划项目(2023024) （2023024）
中国国家铁路集团有限公司科技研究开发计划项目(L2021G002) （L2021G002）
