I have a 2D rotor model with centrifugal load, symmetry conditions (no displacement in angular direction) at the two red lines, a penalty contact condition at the blue lines and fixed radial displacement at the green line. This model uses CPS6 elements and works fine.
Now, I want to add a tangential force at the rotor surface (outer radius). Therefore, I think I need to alter my symmetry conditions. I tried to use the *cyclic symmetry card on the two red lines, but it gives me the following error:
"*ERROR reading *CYCLIC SYMMETRY MODEL
sector angle cannot be determined:
there exists no dependent node
with the same axial position as
an independent node (a tolerance
of 1.e-10 length units is applied).
The smallest axial distance of 1.1679476431456434E-003
exists between dependent node 2
and independent node 15176 "
I already checked the coordinates of the two nodes:
node 2: 7.409513850740e-02,3.069121127568e-02,0.000000000000e+00
node 15176: 2.250125640914e-02,5.332673006825e-02,0.000000000000e+00
If “axial distance” is refering to my z-axis, it doesn’t make sense. Maybe it has something to do with conversion from 2D to 3D elements in CalculiX?
I tried to use my 3D version of the model (C3D4 elements), but I get the same error.
- Is the cyclic symmetry card the right approach for my problem?
- If yes: How can I get rid of the error? Maybe someone has an idea?
Here are my files: Google Drive
Thanks in advance!