Learning Forum

[javat33489]

Hello everyone.
I have a conventional electric motor and a working wheel on it. I rotate the working wheel using a joint revolution.
The wheel rotates due to a moment of 200 Nm, which is 200,000 Nmm.
I use a static structural module.
But when the task starts, I get an error:

Why?
I made a very good grid up to 1 million cells, I did a lot of steps and substeps, but this does not help. Large deflection is on.
Then I will need to conduct a modal analysis (from static press stress).
Tell me please, is the load very large and therefore the grid is destroyed? What should I do?

UPD.

During one of the tests, when I left only one wheel and spun it, I noticed that it stretched a lot, as if large deflection was not turned off:

but it is on.

[dlooman]

If you used true scale you shouldn't see the model expand like that.  The moment doesn't seem too large.  Are you just trying to evaluate stress in the shaft?  For that the impeller would not even need to be modeled.  If you wanted to apply the moment in a realistic way to represent the rotational acceleration of the impeller you could scope a Rotational Acceleration load to the impeller.  If you ramp the load on in several substeps you shouldn't get the error you are reporting in the initial substep.