摘要
本文研究基于压电超声导波的轨道车辆碳钢厚板结构损伤监测技术,通过半解析有限元法(SAFE)计算钢板超声导波的频散曲线,并基于频散特性确定超声导波频率,同时根据超声导波损伤监测原理,提取多种信号损伤因子,并采用加权分布成像算法实现裂纹损伤定位,通过有限元仿真模拟不同长度裂纹下的导波传播,并利用支持向量机(SVM)回归模型预估裂纹尺寸。仿真模拟和试验结果表明,所提出的监测技术能够准确定位裂纹损伤,平均定位误差小于10 mm,且通过SVM模型可有效预估裂纹长度,为轨道车辆碳钢厚板结构的损伤监测提供了有效方法。
This paper discusses the damage monitoring technology for carbon steel thick plate structures of railway vehicles based on piezoelectric ultrasonic guided waves.The dispersion curves of ultrasonic guided waves in the steel plate are calculated by the Semi-Analytical Finite Element(SAFE)method,and the frequency of ultrasonic guided wave is determined based on the dispersion characteristics,and a variety of signal damage factors are extracted according to the principle of ultrasonic guided wave damage monitoring,and the weighted distributed imaging algorithm is used to realize crack damage location,the guided wave propagation under different lengths of cracks is simulated by finite element simulation,and the crack size is estimated by support vector machine(SVM)regression model.The simulation and experiment results show that the proposed monitoring technology can accurately locate the crack damage,with an average positioning error of less than 10 mm,and the crack length can be effectively estimated by the SVM model,providing an effective method for damage monitoring of carbon steel thick plate structures of railway vehicles.
作者
许云飞
彭畅
王光君
Xu Yunfei;Peng Chang;Wang Guangjun(National Engineering Research Center,CRRC Qingdao Sifang Locomotive&Rolling Stock Co.,Ltd.,Shandong,Qingdao 266111,China;Engineering Research Center of Railway Industry on Advanced Structural Materials,National Innovation Center(Qingdao)of High Speed Train,Shandong,Qingdao 266000,China)
出处
《铁道技术标准(中英文)》
2025年第6期1-10,共10页
Railway Technical Standard(Chinese & English)
关键词
超声导波
损伤监测
频散曲线
加权分布成像算法
裂纹定位
ultrasonic guided wave
damage monitoring
dispersion curve
weighted distributed imaging algorithm
crack location
