2 papers indexed
Modal filtering transforms spatial vibration measurements into modal coordinates, simplifying tasks such as model correlation, force identification, and damage detection. Classical modal filters rely on a full modal model consisting of natural frequencies, damping ratios, and mod…
Adam Machynia, Z. Dworakowski, K. Dziedziech, M. Dziendzikowski, K. Holak
TL;DR: The results show that motion magnification substantially enhances crack visibility when amplitude maps are derived from the optical-flow magnitude at low excitation amplitudes, extending the regime in which the crack-breathing pattern is discernible.
This paper investigates the role of phase-based motion magnification in a computer-vision-based methodology for marker-free fatigue crack assessment introduced in earlier work. The approach uses dense optical flow and frequency-domain analysis to capture periodic crack-breathing…