Jump to content
Sagar Desai

thermal analysis

Recommended Posts

hello 

I want to do simple problem in hypermesh

 

a circular rod with both ends fixed

 

initial temp is 20 dec

 

and heated to 300dec

 

what wwill be stresses due to thermal expansion????????????

 

how to do this problem in radioss

 

and i want to use output of this analysis and continue the analysis to frf so can we do that?

Share this post


Link to post
Share on other sites

thank you

so now i have thermal analysis results 

 

now i want to continue my analysis and conduct frf analysis after thermal analysis

 

i think it can be done by cntnlsub r8?

 

even i can do it for large problem only doing frf will consuming lot of scratch space and ram

 

then simultaneously running the both loadcase thermal and frf need even more sources

 

so is there any way in which i can carry out thermal separatly and frf separatly with giving thermal output as input to frf?

 

Share this post


Link to post
Share on other sites
Guest

HI Sagar,

 

CNTNLSUB is valid only for Non-linear subcases. 

 

Can you explain your objective exactly so that I can suggest the best way to work.

Share this post


Link to post
Share on other sites

Yes, you can use OptiStruct. There is no temperature load referencing in FRF analysis. It needs to run thermal-structural analysis and preloading for FRF in the following way,

 

1.       Create heat transfer subcase (100) to obtain temperature distribution

2.       Create static subcase (200) to run thermal-structural analysis using TEMP(LOAD, or BOTH) = 100

3.       Create eigenvalue subcase (300) with same b.c. as modal FRF subcase and use preloading from Subcase 200.

4.       Create modal FRF subcase for vibration load (preloading only works for modal FRF, not direct FRF). It will use modal space from subcase 300 which is preloaded.

 

Please let me know if you have any question.

Share this post


Link to post
Share on other sites

Hi,

 

I want to do a thermal analysis using RADIOSS, as it involves impact as well. In optistruct, I have done the thermal analysis using MAT1 wherein I specified the thermal expansion coefficient (A). What material should I use in RADIOSS and how can I specify the thermal expansion coefficient.

 

Thanks and Regards,

Sai Phanindra

Share this post


Link to post
Share on other sites
On 5/11/2016 at 2:17 PM, Rahul R said:

Yes, you can use OptiStruct. There is no temperature load referencing in FRF analysis. It needs to run thermal-structural analysis and preloading for FRF in the following way,

 

 

 

 

 

1.       Create heat transfer subcase (100) to obtain temperature distribution

 

 

2.       Create static subcase (200) to run thermal-structural analysis using TEMP(LOAD, or BOTH) = 100

 

 

3.       Create eigenvalue subcase (300) with same b.c. as modal FRF subcase and use preloading from Subcase 200.

 

 

4.       Create modal FRF subcase for vibration load (preloading only works for modal FRF, not direct FRF). It will use modal space from subcase 300 which is preloaded.

 

 

 

 

 

Please let me know if you have any question.

 

 

Dear Rahul,

 

Similar kind of problem i want to solve in optistruct.

 

i want to check the structural integrity of my model under the loading conditions of inertial force in all direction, pressure loading,Temperature loading and under certain frequency range.

 

Kindly provide your valuable guidelines  

 

Thanks

RAM

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...