Hi,
I'd like to know where am I wrong with my Model. I'm quite new to Inventor.
Please see the attached Picture and my File.
Thank you and kind regards,
Analyzing Boldted Beam using Nastran
You are having this error due to not enough constraints(or in other way due to the idealization done here).
You may also refer to this article.
I do not think so using shell Idealization doing in this was is correct as selecting either face of the parts for shell we are actually doubling the strength of it.
Now coming to your model. The beam part in the middle, as it has a hollow section inside and no connected mesh, that particular box is free to move as you see in the below image. Run a quick Normal mode analysis, you shall have a good idea on looking at the mode shapes.
Removing shell Idealization for those 6 faces of the box section you can run the simulation, but as said above still many areas are over strengthed.
I would suggest changing your modelling strategy, you can use a mid-surface directly but you shall have un-connected edges and have to rework it. So it might be better to build-up a surface model from the start.
Sohan Kumar
Global Product Support
Hi Sohan,
I have tried to model the edge of the middle beam separately. And chose Solid as my Idealization. But it won't allow me to mesh. IT says Mesh Failed.
I have attached again my model.
regards,
Accepted solution
Initially, I too had mesh failed of solid idealization with the model you have attached in your first post. Even if you look at the shell mesh, there were free edges shown up. It seems that the edges on adjoining faces are not properly knitted together.
Therefore rebuilding the model fixed the issue. “Manage > Rebuild All” and “Manage > Updated”. Do this for each part and then with the assembly. Now your solid mesh shall be successful.
Sohan Kumar
Global Product Support
