Vibration analysis can give you a valuable insight into the response of a structure as it is subjected to dynamic forces through one-off impact, cyclic, transient or random loading.
A crucial application is the assessment of natural oscillations and harmonics of structures, the identification of mode shapes and their frequencies. Weak or overly stiff areas of a component or structure can be identified, tuned or damped. This can remove the likelihood of operational resonance and associated amplified response.
A specialism is the employment of forcing functions, (a simple half sine wave to a complex seismic event) to structural models, revealing the magnitude and location of the stresses at different operating frequencies.