ansys mean inspection unit

[expcic]

Hello.
I'm conducting a modal analysis. I imported the model in mm in classic ansys. Therefore, to have a congruent unit system, I entered the density expressed in kg/mm3. the problem is that natural frequencies of vibration are very low and for other very close to each other. in any case the results do not seem to be correct. I then checked the units of the sizes inserted but there is nothing wrong.
I only noticed that passing the analysis from workbench to classic ansys, the density expressed in kg/mm3 is multiplied by e-3 (ten to less three), and that in doing so the analyses are more reliable (unfortunately I still prefer to use the classic).
Would someone tell me exactly what unit I have to use?
thank you very much to all for any possible help

 

[cacciatorino]

Hello.
I'm conducting a modal analysis. I imported the model in mm in classic ansys. Therefore, to have a congruent unit system, I entered the density expressed in kg/mm3. the problem is that natural frequencies of vibration are very low and for other very close to each other. in any case the results do not seem to be correct. I then checked the units of the sizes inserted but there is nothing wrong.
I only noticed that passing the analysis from workbench to classic ansys, the density expressed in kg/mm3 is multiplied by e-3 (ten to less three), and that in doing so the analyses are more reliable (unfortunately I still prefer to use the classic).
Would someone tell me exactly what unit I have to use?
thank you very much to all for any possible help

on other codes the density is expressed in tonn/mm^3 to have consistent results, when using the mm as a unit of length and the mm/sec^2 for accelerations.

do a test with the only effect of weight and check if the result is consistent.

 

[expcic]

I did the test with the density expressed in tonn/mm3 and the results are consistent and cmq equal to the same analysis made in m.
I noticed this fact, even referring to the ansys guide.
and thank you for confirming it. But where can I find something to talk about?
Thank you very much: