ANSYS negative pivot term
ANSYS negative pivot term
(OP)
Hello
now the VGLUE (my last post)command works. I mesh after gluing the volumes together.
By solving my simulation i have another problem.
In the output window are the following letters written (see attachement).
I do not understand this becaus i constrained my model in all degrees of freedom.
Has someone an idea where the mistake is?
Thanks a lot!!!
now the VGLUE (my last post)command works. I mesh after gluing the volumes together.
By solving my simulation i have another problem.
In the output window are the following letters written (see attachement).
I do not understand this becaus i constrained my model in all degrees of freedom.
Has someone an idea where the mistake is?
Thanks a lot!!!





RE: ANSYS negative pivot term
RE: ANSYS negative pivot term
I don't understand that.
Anybody?
Thanks a lot!
RE: ANSYS negative pivot term
Personally, I would first perform a modal analysis on the model (without any loads) using the boundary conditions as shown in your picture and check for rigid body modes (check for very small or zero frequencies). Check/animate the modes also. If you see very small frequencies then the parts are likely unconnected (check the modes to confirm).
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RE: ANSYS negative pivot term
i'm running a static strucutral analysis.
Unfortunately i have no experience with modal analysis and my benches fail.
RE: ANSYS negative pivot term
------------
See FAQ569-1083: Asking questions the smart way on Eng-Tips fora for details on how to make best use of Eng-Tips.com
RE: ANSYS negative pivot term
here's a picture of the mesh with the three glued volumes in the background. I glued before meshing.
By meshing with MeshTool i use the following settings:
Element Atrributes: Global
Smart Size: On
Mesh: Areas
Shape: Tri
Free: On
Then i pick one area and go to PickAll an Mesh the Volume. I use the Shell 99 Element for Composites (CFRP-Tube)
If i check the mesh, ANSYS tells me that there are no error elements to plot.
Thanks
RE: ANSYS negative pivot term
In my opinion there are no double elements. What do you think?
RE: ANSYS negative pivot term
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See FAQ569-1083: Asking questions the smart way on Eng-Tips fora for details on how to make best use of Eng-Tips.com
RE: ANSYS negative pivot term
Thanks!
RE: ANSYS negative pivot term
Your model has a strange cross section considering you are using shells:
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Should this be:
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i.e. a hollow thin-walled cylinder?
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See FAQ569-1083: Asking questions the smart way on Eng-Tips fora for details on how to make best use of Eng-Tips.com
RE: ANSYS negative pivot term
that means it would be better if i create not the whole volume. I should better create a a hollow cyclinder with a wall thickness of about 0, so that it's like an curved area and mesh this area with the shell element.
Thanks
RE: ANSYS negative pivot term
Thanks
RE: ANSYS negative pivot term
now my simulation is running. I was on the right way but my ANSYS version has a mistake; on another PC it works!
Thanks for your help!