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。
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.
作者
张尧
张辉
朱文发
范国鹏
方文平
ZHANG Yao;ZHANG Hui;ZHU Wenfa;FAN Guopeng;FANG Wenping(School of Urban Railway Transportation,Shanghai University of Engineering Science,201620,Shanghai,China;不详)
出处
《城市轨道交通研究》
北大核心
2022年第12期46-51,共6页
Urban Mass Transit
基金
国家自然科学基金项目(12004240)
中国博士后科学基金项目(2020M671022)。
关键词
轨道板
裂缝检测
瑞利波
裂缝深度
track slab
crack detection
Rayleigh wave
crack depth
