摘要
交流电磁场检测技术(alternating current field measurement, ACFM)以其检测效率高、对表面裂纹响应灵敏、非接触等特性被广泛应用于钢轨表面滚动接触疲劳(rolling contact fatigue, RCF)裂纹的检测。利用COMSOL Multiphysics软件建立三维交流电磁场仿真模型,采用有限元的方法研究不同垂直角度的非均匀裂纹簇对ACFM信号的影响,研究表明,相较于均匀裂纹簇,不同垂直角度的非均匀裂纹簇的Bx特征曲线的波谷位置出现偏移,在此基础上研究了非均匀裂纹簇1~5 mm口袋深度、6~20 mm表面长度、5~15 mm裂纹间距对Bx信号的影响。
Alternating current field measurement technology is widely used to detect rolling contact fatigue cracks on rail surface because of its high detection efficiency,sensitive response to surface cracks and non-contact.In this paper,COMSOL multiphysics software is used to establish a three-dimensional ACFM model,and the finite element method is used to study the influence of non-uniform crack clusters with different vertical angles on ACFM signal.The research shows that compared with uniform crack clusters,the trough position of Bx characteristic curve of non-uniform crack clusters with different vertical angles deviates,On this basis,the effects of non-uniform crack cluster 1~5 mm pocket depth,6~20 mm surface length and 5~15 mm crack spacing on Bx signal are studied.
作者
刘萌
申嘉龙
邝惟创
何铭阳
孟征兵
刘光穆
Liu Meng;Shen Jialong;Kuang Weichuang;He Mingyang;Meng Zhengbing;Liu Guangmu(Key Laboratory of New Technology of Nonferrous Metals and Materials Processing,Ministry of Education,Guilin University of Technology,Guilin 541004,China;Collaborative Innovation Center for Exploration of Hidden Nonferrous Metal Deposits and Development of New Materials in Guangxi,Guin University of Technology,Guilin 541004,China;Guangxi Shenglong Metallurgical Co.,Ltd,Fangchengang 538004,China)
出处
《国外电子测量技术》
北大核心
2022年第7期152-159,共8页
Foreign Electronic Measurement Technology
基金
广西科技基地和人才专项(桂科AD20159020)
广西重点研发计划(桂科AB21076003)项目资助。
关键词
交流电磁场检测
滚动接触疲劳裂纹
非均匀
裂纹尺寸表征
alternating current field measurement technology
rolling contact fatigue crack
non-uniform
crack size characterization
