Scaling Temperature Loads

[cnuk]

I am trying/learning via a simple 2d plane strain (solid182) free thermal expansion problem. I have applied a temperature to an area and solved for the thermal expansion. Works as expected...although the whole TUNIF and TREF still has me a little confused...looks like the delta T used for thermal expansion calc is (T-Tref) although changing Tref and resolving doesn't change result.

Anyway, I now want to redo the thermal expansion at a different temperature. I know I can scale the results manually, but I wanted to scale the temperature load to see if I can get it to work using Ansys. I tried BFSCALE,temp,2,20 and re-solved, but unfortunately my results did not change. BFESCAL didn't change the results either. The only way I could get it to work is delete the temperature load on the area and add in with the new temperature value.

Can someone tell me how I could get load scaling to solve the same problem? My trials didn't work as expected.

Thank You

 

[cloche]

Be sure to issue the SBCTRAN command to transfer model-entities-related BC to elements-related BC. From what you write, I think you applied temperature BC to areas, not to elements. Scaling area BC will get their temperature value varied, but since the solution has already run once, the elements still have their previous value unless you force it to be overwritten.
I had the same type of discrepancy with displacement BC once upon a time...

Claudio

 

[cnuk]

Thanks. I did apply the load to an area. I will try the SBCTRAN command and re-solve to see if it fixes my problem.

Thanks again for the quick response.