The Operating Deflection Shape (ODS) is the simplest way to see how a machine or structure moves under given operating conditions.  

The ODS contains the overall dynamic response of a structure due to forced and resonant vibration.  

There are two ways in order to make an ODS:

 

Time-based ODS

 

The time-based animation allows to sweeps in a set of time histories in order to describe the motions at multiple points and directions on a test item.  

 

Frequency-based ODS

 

The frequency-based animation allows to animate the structure tested in correspondence of the interesting frequencies. With this animation, the resonant vibration and other types of forced vibration can be observed.

Operating Deflection Shape of gas turbine