Jump to content

Recommended Posts

Good afternoon,

 

I have a BEAM (CBEAM) component and I would like to see how it deforms due to a VARIABLE TEMPERATURE applied to the whole BEAM. Is that possible? Obviously I would only like to see how it deforms on the direction of it's axis (as a BEAM is a 1-D element). The TEMPERATURE would go from 17 to 23 degrees in 6 hours (1 degree increment every hour)

 

Thanks a lot in advance!

 

Sergio

Share this post


Link to post
Share on other sites
12 hours ago, Simon Križnik said:

Hi,

 

this is a simple analysis:

 

For more advanced thermal simulations please refer to FREE eBook: Learn Thermal Analysis with Altair OptiStruct

thermal_beam.femUnavailable

 

Okk thanks!!

 

One more question. It's a different situation. Now I have a One-Step Transient Thermal Stress Analysis (I already checked the info around this). So I did a model with the environment as heat source (the temperature of the surroundings go from 17 to 23 degrees), so I used a TLOAD, TABLED, SPC TEMP, SPCD, TSTEP and TEMP cards to do both a heat tansfer transient and a linear static analysis with the output temperatures. Now, I'd like to create more heat sources (for example due to the heating of a engine). Do I have to create the same cards now for this new source (having in mind that I want to mantain the source of the environment) and then include both TLOADS in a DLOAD? (and therefore introduce this DLOAD in the LoadStep).

 

Hope I explained well,

 

Thanks a lot in advance

 

Share this post


Link to post
Share on other sites

Yes, according to Learn Thermal Analysis with Altair OptiStruct ebook:

 

Quote

When there is only one TLOADi present in the model setup, it can be directly referred by the DLOAD subcase entry in Heat Transfer (Transient) load step. In case of multiple TLOADi definitions, user needs to create another load collector with card image DLOAD, in which all TLOADi IDs must be referred with proper scaling factors and global scale factor. The DLOAD load collector is then referred in DLOAD subcase entry in load step definition

 

Attached is an example from the ebook which I modified to include multiple heat sources (ambient & local).

Note: The ambient temperature is applied with convection on the outer surface. The local temperature is imposed at one end of the tube. This approach is valid for 3D elements, but not for 1D beams.

Pipe_One_Step_Transient_multiple.fem

Share this post


Link to post
Share on other sites
On 3/6/2020 at 10:30 PM, Simon Križnik said:

Yes, according to Learn Thermal Analysis with Altair OptiStruct ebook:

 

 

Attached is an example from the ebook which I modified to include multiple heat sources (ambient & local).

Note: The ambient temperature is applied with convection on the outer surface. The local temperature is imposed at one end of the tube. This approach is valid for 3D elements, but not for 1D beams.

Pipe_One_Step_Transient_multiple.fem 2.63 MB · 1 download

And is there any way of doing it with 1D beams?

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
You are posting as a guest. If you have an account, please sign in.
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.


×
×
  • Create New...