The invention discloses a steel rail damage identification and positioning method. The method comprises the following steps: establishing a steel rail fluctuation characteristic equation to obtain a steel rail frequency dispersion characteristic equation; establishing a steel rail two-dimensional high-order spectral element method model to obtain a steel rail guided wave frequency dispersion curve; analyzing the detection frequency and the specific mode of the steel rail, and acquiring a guided wave excitation signal and a receiving signal in a non-damage state and a damaged state of the steel rail; the difference value of the guided wave frequency dispersion characteristic parameters in the steel rail non-damage state and the steel rail damage state is obtained, and the difference value is the guided wave frequency dispersion characteristic variable quantity; constructing a nonlinear perturbation relationship between the variation of the steel rail damage and the variation of the guided wave frequency dispersion characteristic to judge whether the steel rail to be detected is damaged or not and the damage degree; if damage exists, damage positioning is carried out through an excitation signal and a receiving signal of the ultrasonic guided wave detection system. The method has the beneficial effects that the steel rail detection frequency is reduced, and the damage condition and the damage position of the seamless track steel rail can be simply and accurately detected.
本发明公开了一种钢轨损伤识别和定位方法,该方法为:建立钢轨波动特征方程获取钢轨频散特性方程;建立钢轨二维高阶谱元法模型得到钢轨导波频散曲线;分析钢轨检测频率和特定模态并获取钢轨无损伤状态下和钢轨有损伤状态下的导波激励信号与接收信号;获取钢轨无损伤状态与钢轨有损伤状态下导波频散特性参数的差值即为导波频散特性变化量;构建钢轨损伤的变化量与导波频散特性变化量的非线性摄动关系判断出待测钢轨是否有损伤和损伤程度;若有损伤,则通过超声导波检测系统的激励信号和接收信号来进行损伤定位。本发明的有益效果:减少钢轨检测次数,能够简单、精准检测到无缝线路钢轨的损伤状况和损伤位置。
Steel rail damage identification and positioning method
一种钢轨损伤识别和定位方法
29.12.2023
Patent
Elektronische Ressource
Chinesisch
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