Boundary conditions based on local coordinate system

Hello CalculiX community, I want to fix the degree of freedom normal to a certain surface and this surface is not perpendicular to the global x, y or z axes. How can I do that? Thanks in advance

You can use the *TRANSFORM keyword for this purpose. Check it in the documentation.

The documentation for *BOUNDARY specifies that degrees of freedom 1,2 and 3 are for local directions.
These coincide with the global ones if no transform applies.

So you need to define a *TRANSFORM for the nodes in question. (Which basically is the same as defining an *ORIENTATION.)

Thank you so much, and sorry for the late reply