Shell buckling

[simulatio]

i modeled a simple cylinderical shell. The goal was to find the linear buckling load. But, there is a problem. I don't know why the eigen-buckling solution dose not work. The text file of ansys is attached.

 

[FREABRL]

Try to build the model with shell 181.

 

[Struct71]

I see that SHELL93 is no longer supported in my version (12.1). It may still work, but make sure that all functions are still working properly.

I succesfully did a buckling analysis with SHELL63, but there were no curved surfaces...