System Identification and Modal Analysis in Structural Mechanics (Systeemidentificatie en modale analyse in de bouwmechanica) KU Leuven
This work addresses the estimation of modal parameters from measured vib ration data. A linear time-invariant model is fitted to the data and eig enfrequencies, damping ratios, mode shapes and, whenever possible, modal scaling factors, are extracted from the model. The current operational modal testing practice, where the model is estimated from output-only da ta, suffers from three important problems: the modal scaling factors can not be ...