Execution Problem 902 - Simply Supported beam

[Anonymous]

Hi,

I'm modeling simple supported concrete beam to Footfall analysis. Execution problem 902 is message during modal analysis. I saw the post with same name and my model is in 3D. So could you please give me any instructions.

Regards

[Rafal.Gaweda]

Mayve this :
http://forums.autodesk.com/t5/robot-structural-analysis/execution-problem-no-902/m-p/3429827/highlig...

if not, your file is needed

[Anonymous]

I checked all posts. My model is linear, modal analysis is linear analysis and all supports are also pinned (there is no nonlinearity through any uplift or similar).

In that table in post - 902: ''negative eigenvalue has been obtained '' -- robot wan't to calculate eigen values in my case. The message appeares earlier.

There is robot file.

Thank you Rafal for fast answer.

Regards

[Rafal.Gaweda · Accepted solution]

Fix RX at least in one of the supports.

[Anonymous]

Thank you.

Regards

[Anonymous]

Hi, please somebody can help me with the error Execution Problem 902, I know that is a problem with the   Negative eigenvalue has been obtained, but I do not how to fix it.

Regards

Abel

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@Anonymous wrote:

Hi,

I'm modeling simple supported concrete beam to Footfall analysis. Execution problem 902 is message during modal analysis. I saw the post with same name and my model is in 3D. So could you please give me any instructions.

Regards

---

[Rafal.Gaweda]

File please.