How can i make a frequency simulation ?

Hello :)
I work at a NDT Laboratory (non-destructive testing) and we have a problem.
We are trying to make a comparison from a computer generated simulation with a real-life one. We tried using Solidworks (simulation) 2011 and ANSYS 13 but got poor result.
We try to see what happens to a ball bearing when it hits a vibration of 98570 hz and 190000 hz ( longitudinal frequency and transversal frequency; 98570 = 1 lambda, 197140 = 2 lambda).
Apparently both softwares have frequency simulation but none of them give you the posibility to insert your own frequency. they have predetermined frequency like 88160 hz, 87920 hz, 90160 hz. Both Solidworks and Ansys have those exact freqs.
In ANSYS we tried Modal simulation and Modal Simulation with Random Vibration but way to insert your own freq. Probably we are not doing this the way it sould (none of us are professional users of ansys).

Hoping i was clear enough and provided enough information, I thank you.

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2 Answers

The analysis is only reduce the test time, and can replace the test, I think so

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Good morning,

From my point of view, this type of study with imposed frequency is more reliable to be done using harmonic domain. To do this you must made first of all modal study. After that made harmonic study. Modal study offers instead only natural frequency and deformations of an component. I´m am a little bit in doubt with scope, because if you want to know what is their frequency you are already do correct option. In fact I understand that you need to used forcing vibration. Try to use harmonic study. If you have possibility send me an zip archive with assembly of ball bearings (3D CAD model both with an parasolid and iges).

Please announce me if you have other question. Keep in touch referring to this study. It is very interesting.

Best regards.

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