Vibration analysis is either analysis of normal modes or analysis of forced vibrations (dynamic response analysis). In dynamic response analysis the loading can be of harmonic exitation or shock loading for example.

As aresult one obtains those frequencies and modes of vibration that the structure tends to follow (normal mode analysis) or displacements, velocities, accelerations and stresses due dynamic excitation (response analysis).

Load determination and results interpretation are an important part of dynamic analysis. Strain and acceleration measurements are often used as an aid of getting realistic loads.