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Vibration-based methods for structural and machinery fault diagnosis based on nonlinear dynamics tools

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Figure

Figure 1: Time history a), spectrum b) and phase diagram c) of an aluminum circular plate with ra-dius R=0.1 m and h=0.01m subjected to harmonic loading with amplitude 1500 kN uniformly dis-tributed along the plate surface, excitation frequency equal to the first natural frequency (ωe = 15300 Rad/s)
Figure 2: Plate and defects
Figure 4: Poincaré map of the center of the plate in the case of side damage. Black dots – undamaged plate
Figure 6. Contour plots side damage (a) -level 1,(b)- level 2
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