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How to do "carve-out modeling" or "sub-modeling" with beams?

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How to do "carve-out modeling" or "sub-modeling" with beams?

Hi everyone.

We to solve a problem with large frame-type models. The idea is to claculate a whole frame using idealized beams first, obtain resultant forces in certain parts and apply equivalent forces on solid models afterwards. How to do it?

I started from testing the functionality of Creo Simulate 2.
Firstly, I created a test frame, where beams were created using sketched curves and datum curves.

Creo Simulate model:

2.JPG

Results window - stress Von Mises:

3.JPG

I am interested in obtaining forces in the central C - frame, which is most loaded. When I go for Beam Resultant - Force - Y and choose the frame, I obtain some results, which I am not able to interpret.

4.jpg

While applied vertical force along Z direction is 7500 N, fringe image shows two opposite resultant forces.

5.JPG

The resultant forces along X axis look bizzare as well:

6.JPG

What does that all mean? I just want to find out where can I obtain correct resultant forces and on what areas should I apply them?
Thanks a lot in advance, the
Mikhail

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Re: How to do "carve-out modeling" or "sub-modeling" with beams?

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Re: How to do "carve-out modeling" or "sub-modeling" with beams?

Re: How to do "carve-out modeling" or "sub-modeling" with beams?

Hi,

You may also wish to consider forces in the beam csys rather than WCS.

The pull down under 'relative to' defaults to WCS.

Also consider GRAPH - SHEAR AND MOMENT

as opposed to 'fringe'

You can a single beam to graph.

Regards