Structural condition assessment based on modal flexibility from operational modal analysis and model updating

Due to the absence of excitation measurement, only modal frequencies and unscalled mode shapes can be identified from OMA. To have accurate modal scaling, a FEM is built and updated based on identified modal parameters. Modal flexibility and deflection shapes can then be obtained based on modal frequencies, unscalled mode shapes identified form OMA, and modal scaling factor derived from updated FEM.

2 RELAVANT RESULTS