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Subject: Re: [STRUC][THERM].About transient time stepping
Author: antonio
Date: 2008-04-24 15:54:24

Ok, so thank you very much! If I understand well my macro should have
some lines looking like these:

*DIM,HG,TABLE,4,1,1,TIME
HG(1,0)=0.0,10.0,40.0,60.0 ! TIME
HG(1,1)=0.0,5.0e6,20.0e6,30.0e6 ! HGEN
bfa,1,hgen,%HG%

And then I should fix my time step with TSRES. Is this ok?


On Thu, 2008-04-24 at 10:30 -0500, Singer, Edmund A (US SSA) wrote:

> See Martins post. It is applicable. Your time stepping in ansys has
> nothing to do with what your time step in the table is. It will
> interpolate.
>
> Just make sure the table resolves the heat input you are looking for,
> and then make sure the ansys timestep resolves the solution correctly.
>
> BAE Systems
> Edmund Singer P.E.
> Staff Engineer
> Applied Mechanics Group
> Fluid and Thermal Sciences
>
>
>
> -----Original Message-----
> From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
> Behalf Of antonio
> Sent: Thursday, April 24, 2008 12:17 PM
> To: ANSYS User Discussion List
> Subject: Re: [Xansys] [STRUC][THERM].About transient time stepping
>
> Hi Mike,
>
> To resume the problem, what I want to do is to load a table on ANSYS
> with my HGEN time dependent values (Calculated with another code) and
> apply them as a loads. Since I calculated those values with a very fine
> mesh It could be interesting to use a broader time stepping for my
> ANSYS solution (although my table will have much more information) in
> order to reduce my computational time.
>
> Antonio Lafuente
> PhD Student
> UPM Madrid
>
> On Thu, 2008-04-24 at 11:03 -0400, Yaksh, Mike wrote:
>
> > Hi Antonio
> >
> > You need to specify how the heat is dependent on the temperature or
> some
> > other boundary condition. If you have neutron fluence (?) specified
> and
> > then maybe the heat generation is a function of the neutrons, and
> maybe
> > this is a function of temperature or deformation. This would require
> an
> > iterative procedure, but the overall flow chart of what variables
> other
> > variables is needed, first.
> >
> > Mike Yaksh
> > NAC International
> > Norcross GA
> >
> > -----Original Message-----
> > From: xansys-bounces_at_xansys.org [mailto:xansys-bounces_at_xansys.org] On
> > Behalf Of antonio
> > Sent: Thursday, April 24, 2008 12:19 PM
> > To: xansys_at_xansys.org
> > Subject: [Xansys] [STRUC][THERM].About transient time stepping
> >
> > Hi all,
> >
> > I'm trying to run a thermo-mechanical transient simulation using
> direct
> > coupled method with plane13 elements. My problem is that the generated
> > heat I have follows a time dependent law governed by nuclear physics
> > which I've obtained using another code. I would like to impose that
> load
> > in my problem, with an appropiate tie stepping, but after RTFM and
> RTFM
> > again and looking through the verification manual I don't see very
> clear
> > how I could do this. There's a lot of information, I know I should use
> a
> > data table and some more things, but I'm having real difficulties to
> put
> > it all in order and define a correct path to follow. Does anyone with
> > experience on this could recomend me some kind of tutorial or give me
> a
> > hand on it? Thanks in advance
> >
> > Regards
> >
> > Antonio Lafuente
> > PhD Student
> > UPM Madrid
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Posts possibly associated with message #93011AuthorDateScore
93006Re: [STRUC][THERM].About transient time steppingMike Yaksh2008/04/24 
93007Re: [STRUC][THERM].About transient time steppingMartin Liddle2008/04/24 
93008Re: [STRUC][THERM].About transient time steppingantonio 2008/04/24 
93009Re: [STRUC][THERM].About transient time steppingantonio 2008/04/24 
93010Re: [STRUC][THERM].About transient time steppingEdmund Singer2008/04/24 
93011Re: [STRUC][THERM].About transient time steppingantonio 2008/04/24 
93012Re: [STRUC][THERM].About transient time steppingantonio 2008/04/24