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Modal Testing and Analysis
by Ardalan Sabamehr, Ph.D.
What is Modal Analysis?
As structural analysis techniques continually derive and become increasingly complicated, the limits in the structural behavior become increasingly apparent. These limits are used and are prominently prevalent in the field of structural dynamics, namely in the case of vibration-based analyses of structures. Additionally, standard dynamic analyses of large-scale structure can be too sophisticated to be done by manual calculations and need to be approached differently.
In the last few decades, modal analysis has become a major method for evaluating the condition of structures. Furthermore, it is a reliable technique for optimizing and improving the dynamic characteristics of structures. Modal analysis (also called vibration-based system identification) is a technique used to extract the inherent dynamic behavior of a structure in the form of its modal properties (natural frequency, mode shapes and damping ratio).
