Structural Health Monitoring systems based on ultrasonic guided waves are one of the most promising non-destructive damage detection and characterization strategies for engineering structures. However one of the biggest implementation problems of such systems are complicated interpretation and analysis of the signals captured during measurements. In order to solve this problem the computer model enabling easier analysis and interpretation of the guided wave signals in the object under investigation was developed. The model enables to predict the propagation of different guided wave modes in rectangular plates, to estimate propagation times, to predict waveforms of the signals, to analyze the waves reflected by the plate boundaries and to retrace their propagation path. This paper presents the main idea of the proposed model and demonstrates it on the example of rectangular plate made from glass fiber composite. The comparison with experimental results demonstrates good coincidence of estimated propagation times and paths. However, the proposed model was not so effective predicting waveforms and amplitudes of guided wave modes.
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