Termal loads
Termal loads
(OP)
Hi all
I have a question concerning termal loads. I want to use a gradient load om a model consisting of plates. I know that Nastran can do it but how can it be done with FEMAP as preprocessor. Termal load does as far as I can see only mean a temerature expansion over the entire section, not a gradient.
Does anybody have any experience, good or bad?
Regards
Thomas
I have a question concerning termal loads. I want to use a gradient load om a model consisting of plates. I know that Nastran can do it but how can it be done with FEMAP as preprocessor. Termal load does as far as I can see only mean a temerature expansion over the entire section, not a gradient.
Does anybody have any experience, good or bad?
Regards
Thomas





RE: Termal loads
Generally, when you use nodal temperature loads you can define a temperature gradient. If you use thermal body loads, the entire "delta-T" gets applied to the entire model.
pj
RE: Termal loads
I think I have been a bit unclear. What I want to do is to apply a termal gradient on a plate element, one temperature on the upper and a different on the lower surface.
If I follow your idea, pj, the resulting load is a TEMP load in the Nastran bulk data. The TEMP load is based, as far as I know, on gridpoints. No element "location" specified.
What I need is a TEMPP1 load, elemental temperature. In Nastran bunk data I can than then give T1 one value and T2 another or the same value. This results in gradient if T1 not equal to T2 and "simple" expancion if T1 egual to T2.
My problem is that FEMAP writes T1 and leaves T2 blank, defaulting it I guess to T1. If I manually input a different value for T2 I get "preprocessor validation error". Basically, the N4W-bundle does not allow me to "hack" the bulk-data-deck.
I have been told that anything possible in Nastran is also possible in FEMAP, but sometimes it's a bit complicated.
Does anybody know a "complicated" mothod to get a temperature gradient?
Thomas