How can I obtain Frequency Response Functions from ANSYS software?

[arpwpagr]

Hi all,
I want to get Frequency Response Functions from ANSYS software. Can anyone give me a guideline?

Thank you.

 

[minger]

You're going to need to elaborate quite a bit more on what you mean exactly.

If you mean what I think you mean, you'll need to do a harmonic analysis over a range of frequencies. Pick a node of interest, and use the time-dependent processor to plot displacement over frequency.

 

[arpwpagr]

I have time varying force. Is there any possibility to apply such type of load in harmonic analysis. I know transient analysis can do it. If load can't be applied in harmonic analysis, can I do transient analysis and is it possible to get FRF using MATLAB? Please help me.

 

[minger]

Nope. A harmonic analysis is essentially a steady, cyclic condition. If you vary the force in time, then the response will not be purely cyclic.

So, we I mentioned before, you need to elaborate more. You want a response function as both a function of time and frequency?

 

[arpwpagr]

I want to get stiffness matrix and mode shape values from ANSYS software. Please help me.