Learning Forum

[Miguel Socias]

Dear all,

I am trying to run a static structural simulation of a beam. I get the following error:

The material used in this simulation is structural steel (ansys default configuration), therefore, there shouldn´t be any material related issues.
The model is properly constrained since there is a fixed support applied to two different faces (see figure below). Also, there shouldn´t be any contact related issues because the geometry is made of a single solid, so there are no need for contacts. 

If the "Solver pivot checking" is turned off, the simulation converges, but the deformation obtained are not correct.

Maybe, there is another kind of geometry related issue since the beam internal geometry is quite complex (see figure below).

I would be very grateful if you could help me to solve this problem. Thank you in advance.

Miguel

[Erik Kostson]

 

Hi

It sounds like something is not connected – run a modal analysis with the structure and the fixed support (no loads are needed of course).

 

If all is ok we should see non zero frequencies only (0 Hz means rigid body mode which is that something is not connected).

 

Search also the forum and internet for more info on pivot ratios and errors.

https://www.google.com/search?q=solver+pivot+error+and+convergence+errors+and+ansys&sca_esv=469084b56d0a10d6&sca_upv=1&rlz=1C1GCEA_enDE1032DE1032&sxsrf=ACQVn0-w_Nl86Z1XWkx5qERg4RHJrze-HQ%3A1712310854191&ei=RsoPZsaiC9fZhbIP1cypIA&ved=0ahUKEwjG3dWB56qFAxXXbEEAHVVmCgQQ4dUDCBA&uact=5&oq=solver+pivot+error+and+convergence+errors+and+ansys&gs_lp=Egxnd3Mtd2l6LXNlcnAiM3NvbHZlciBwaXZvdCBlcnJvciBhbmQgY29udmVyZ2VuY2UgZXJyb3JzIGFuZCBhbnN5czIIEAAYgAQYogQyCBAAGIAEGKIEMggQABiABBiiBEj8PFCcB1i2OXAAeAGQAQCYAXagAfEMqgEEMTYuNLgBA8gBAPgBAZgCEaACowrCAgQQABhHwgIHECMYsAIYJ5gDAIgGAZAGCJIHBDE0LjOgB-g4&sclient=gws-wiz-serp

All the best

 

Erik

 

[Miguel Socias]

Thank very much for your quick reply, Erik

I will try that out.

Kind regards