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Important Need Clarification regd post processing?

Sai Vignesh

I ran Frequency response analysis and when i viewed the results in frequency domain in modal view my stress is different when i change to linear transient mode my stress results are different why so output should be same right how changing to modal view /linear transient changes my result???

Kindly help

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Rahul Rajan_21763

Please use transient animation mode to post process output of Frequency response analysis.Modal animation should be used only for modal analysis outputs.

Sai Vignesh

I understand that why that difference in stress occurs I just wanna know what makes the difference If you could kindly explain

Altair Forum User

Hi @Sai Vignesh

The transient animation displays the model in its timestep positions as calculated by the analysis code.

Modal animation creates and displays an animation sequence that starts and ends with the original position of the structure. The deforming frames are calculated based on a sinusoidal function, and the results are also calculated as the same.