Dear all,

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 â€śaxial distanceâ€ť is refering to my z-axis, it doesnâ€™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!

Best regards,

Alex