PSI - Issue 37

Andrzej Katunin et al. / Procedia Structural Integrity 37 (2022) 292–298 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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the tested plates and achieve mode shapes of vibration. The experimental setup is presented in Fig. 2. More details about the setup are available in (Katunin and Przystałka, 2014).

Fig. 1. Damage scenarios considered in the study: (a) through-the-width crack; (b) extrusion; (c) two extrusions and a crack (Katunin and Przystałka, 2014) .

Fig. 2. Experimental setup (Katunin and Przystałka, 2014) .

The measurements were performed in the grid of 64×64 predefined measurement points located equidistantly in the area of 250×250 mm (reduced to the clamping – see Fig. 2). The vibration velocity signal was acquired in the frequency range of 0 – 3.2 kHz with the resolution of 1 Hz. To improve the quality of the acquired signals five measurements were performed for each measurement point, and then the measurements for each point were averaged. Five mode shapes were considered in further analysis.