Hi,
Sorry but i introduced the wrong equation above. f_p and f_r do not exist. There is just a f.
The equation is: F=[F]*cos(mode*p*theta-2*pi*f*t-mode_phase)
theta=angle
p=poles
mode=mode of vibration
f=frequency
How could i introduce this in frequencies and phase for all the nodes in the...
Hi to everyone,
I am currently trying to introduce forces to an induction motor but i encountered a little problem.
I was given the radial pressure that a stator suffers with its frequency(f_p). Besides i was told , that this pressure field rotates around the centre axis of the stator at a...
Hi Bastek,
-Related to the first option, do you mean to model it with Springs?
-Related to the second option, do you mean to model it with 3D Elements?
I would choose the second option. I would insert the tensile modulus as a function because i dont think that the soil behaves as a linear...
Hi and Happy New Year!
I've been working on simple models which just had a rotor. Nothing else. But after modifying the BDF file i get another error that i cannot solve. As i dont have any references I'm not sure if the error is from the modelling or from the Solver and the problem above...
Thanks Spirit
It looks like that the problem is solved. I get other Error reports, but at least the "ERROR ON BULK DATA ENTRY" isn't there anymore.
I'll keep fighting with the modell.
Thank you for all
Supituki
Thanks again Spirit!
As i said before i'm new with Nastran and i don't know much about it.
I have found in the .bdf file where this RSPINR array is written and i can change it but that is after the analysis is done. Before the analysis i have just the .db and .ses, where i cannot change...
Thanks Spirit for your answer.
If you were wondering what that 0. means, it is the Damping coefficient of the Rotor. So i think that the problem isn't that. I introduced another example with damping and i got the same line but with a .3 instead of a 0.
Now i remember that a mate had problems...
Hi everyone,
I have a problem with a rotor dynamic analysis. I'm new with Nastran but after trying thousand of times i dropped the towel with this little issue. These are the steps i have followed:
-I define a steady rotor with all its nodes, spin direction nodes and spinning velocities. There...
