ODS = Motion of structure vibrating naturally (for example bridge vibration) or when excited by an unknown force (for example generator vibration). Prosig’s Structural Animation software performs ODS analysis.
OMA = Modal Analysis
Prosig’s Modal Analysis software performs OMA.
If an engineer were to animate a wire-frame model using a set of acceleration Transmissibility spectra, he would be viewing Operating Deflection Shapes (ODS).
If an engineer were to perform some analysis using the Prosig software Modal Analysis they would be said to be performing OMA.
OMA studies the damping factors and natural frequencies of a structure.
Additionally it is possible create an experimentally synthesised Modal FRF and then use Prosig’s Structural Animation to animate this data, this is also known as OMA.
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