| 杨延强,朱俊臻,冯辅周,王红军.涡流脉冲热像对钢轨滚动接触疲劳裂纹表面长度的
量化评估研究[J].电子测量与仪器学报,2021,35(9):144-149 |
| 涡流脉冲热像对钢轨滚动接触疲劳裂纹表面长度的
量化评估研究 |
| Study of eddy current pulsed thermography for quantifying surface lengths ofrolling contact fatigue cracks in rails |
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| DOI： |
| 中文关键词: 涡流脉冲热像 钢轨滚动接触疲劳裂纹 缺陷量化 |
| 英文关键词:eddy current pulsed thermography rolling contact fatigue cracks defect quantification |
| 基金项目:国家自然科学基金（51875576，52005510）、无损检测技术教育部重点实验室开放基金（EW201980445）项目资助 |
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| 中文摘要: |
| 涡流脉冲热像技术作为一种新型的无损检测技术,兼具有感应加热非接触、高效和红外热像快速直观等优点,已应用于
不同领域关键部件的缺陷检测与评估。 针对钢轨踏面存在的滚动接触疲劳裂纹,利用涡流脉冲热像开展裂纹表面长度量化研
究分析。 针对滚动接触疲劳裂纹形貌分布复杂这一特点,设计了一套结合裂纹响应提取和裂纹识别的流程。 并通过线性拟合
参数对比分析了在裂纹响应提取中使用的不同方法的性能。 试验结果表明,采用加热前期的热像数据进行主成分分析得到的
热模对裂纹长度量化效果最好,具有最高的拟合优度 92. 8%,灵敏度 5. 91,和最小的残差 2-范数 2. 24。 |
| 英文摘要: |
| By combining the advantages of eddy current pulse excitation and infrared thermography, eddy current pulsed thermography
(ECPT) has been used for testing and evaluating defects of key components in many areas. This paper focuses on using ECPT to test
rolling contact fatigue (RCF) cracks and quantify their surface lengths. Due to the complex surface shapes of RCF cracks, a crack shape
extraction procedure is designed which mainly includes crack response extraction and crack identification. Fitting parameters are utilized
to evaluate the performances of four methods used in the crack response extraction step. Experimental results show that PCA-based
thermal pattern in the early heating stage has the best performance for surface length quantification with its R
2
, sensitivity, and 2-norm of
residuals of 92. 8%, 5. 91, and 2. 24, respectively. |
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