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Ansys Learning Forum › Forums › Discuss Simulation › General Mechanical › Pre-stressed modal why changing end time causes natural frequency to change? › Reply To: Pre-stressed modal why changing end time causes natural frequency to change?

October 10, 2023 at 11:50 pm
Ankush Choudhary
Ansys Employee

Hi Weihan,

Yes, this is the reason you are getting different natural frequencies, as the static structural data is coming at different time in Modal analysis. If you want to have the prestress data at the end of static structural, then you can change the option to program controlled, as I have shown above.

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