基于瑞利波的轨道板表面裂缝深度检测方法
张尧1张辉1朱文发1,2范国鹏1方文平3
Detection Method of Track Slab Surface Crack Depth Based on Rayleigh Wave
ZHANG YaoZHANG HuiZHU WenfaFAN GuopengFANG Wenping
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作者信息:1.1. 上海工程技术大学城市轨道交通学院， 201620， 上海；
2.2. 华东理工大学机械与动力工程学院， 200240， 上海；
3.3. 杭州戬威机电科技有限公司， 311100， 杭州
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Affiliation:School of Urban Railway Transportation, Shanghai University of Engineering Science, 201620, Shanghai, China
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Key words:
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DOI:10.16037/j.1007-869x.2022.12.008
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中图分类号/CLCN:U213.2+41
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栏目/Col:学术专论
摘要:
为能高效精确地检测轨道板裂缝，建立了含有表面裂缝的轨道板二维有限元模型，分析并总结了瑞利波对轨道板表面裂缝的作用规律，研究了不同裂缝深度下接收到的瑞利波时域信号的特点。基于瑞利波传播时间差法的原理，提出了基于瑞利波的轨道板表面裂缝深度检测方法，并利用有限元模型对检测结果进行了验证。验证结果表明：检测结果误差较小，准确高，说明该检测方法具有理论可行性。
Abstracts:
In order to detect the cracks in track slab effectively and accurately, a two-dimensional finite element model of track slab with surface cracks is established, the action law of Rayleigh wave on surface cracks is analyzed and summarized, and the characteristics of Rayleigh wave time-domain signals received at different crack depths are studied. Based on the principle of Rayleigh wave propagation time difference method, a method for detecting the depth of track slab surface cracks based on Rayleigh wave is proposed, and test results are verified by finite element model. The verification results show that the error of the detection results is relatively small and the accuracy is high, indicating that the detection method is theoretically feasible.
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