Defect Detection inside a Rail Head by Ultrasonic Guided Waves
نویسندگان
چکیده
Early detection of defects inside a rail is great significance to ensure the safety transit. This work investigated ability ultrasonic guided waves (UGWs) detect internal in head. First, model UGW propagation rail, which has an irregular cross-section, was constructed based on semi-analytical finite element (SAFE) method. Fundamental characteristics, such as wavenumber, phase or group velocity, and wave structure were then calculated. Following modal vibration energy distribution analysis, mode that sensitive transverse fissure (TF) selected, its excitation method proposed. The effectiveness confirmed by simulations performed ABAQUS software. According simulation data, dispersion curve calculated using two-dimensional Fourier fast transform (2D-FFT) coincided well with SAFE After that, sensitivity selected validated locate also demonstrated. Finally, effects frequency, defect size, vertical horizontal depth reflection waveforms investigated.
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ژورنال
عنوان ژورنال: Symmetry
سال: 2022
ISSN: ['0865-4824', '2226-1877']
DOI: https://doi.org/10.3390/sym14122566