Reply To: Natural Frequencies Anslysis

[Erik Kostson]

 

 

 

Hi

‘I guess the max deformation in the model is 1.1895″, when the Natural Frequency is 87.653Hz, Am I right or not?’

 

Yes that is correct, 87.653 Hz is the natural frequency of this natural mode – but have in mind that the displacement values (1.1895 here say) for that frequency/mode are normalized/scaled eigen vectors/modes. So the absolute/exact values (1.1895 inch) are not of importance. See here for  discussion on this: https://innovationspace.ansys.com/forum/forums/topic/unrealistically-large-deformation-modal-analysis/

 

The absolute/actual value of the displacement/stress is only meaningful when we apply a force later in a harmonic analysis say, and look at the actual response of this structure due to this force.

 

For all these details see our free courses on modal and dynamic analysis:

https://innovationspace.ansys.com/product/modal-analysis-in-ansys-mechanical/

https://innovationspace.ansys.com/product/intro-to-modal-based-methods/

All the best

Erik