When a component or assembly is subjected to dynamic loads, its response will be dependent upon its natural frequencies and mode shapes (see Modal Analysis page), the frequency content and magnitude of the loading, and damping levels.
Once the natural frequencies and mode shapes have been identified, a vibration analysis can be performed to determine the structural vibration responses and confirm whether the design will be adequate and meet the requirements.
Results which are often of importance include displacements, velocities, accelerations and stresses (which are of particular interest where fatigue failure may be an issue).
The vibration analyses which are commonly performed are:
- Harmonic response (sinusoidal input)
- Random vibration analysis
- Seismic analysis
- Transient response
In some projects, the vibration analysis identifies that the design has excessive responses and hence needs to be revised. In these instances, where required, Eatec Engineering Analysis works with the client to optimise the design in order that it complies with the structural vibration requirements.