combining structural optimization (Topolgy optimization) and thermal analysis

mohajerb@uwindsor.ca

I am doing linear static structural optimization (topology optimization) of a plastic injection mold. I have the temperature of surfaces of my geometry. I used them as thermal load.  Can I combine structural optimization with thermal analysis? Does Optistruct combine the displacement due to pressure applied to the model with thermal expansion?

1:

I created a load collector with card image of load to combine my pressure load and thermal load is that correct? I also have gravity. I entered 3 for the LOAD_Num_set. because I wanted to combine pressure, gravity and thermal load. Is that right?

 

For the loadsteps: type of analysis is linear static. I have checked SPC and selected constraint. I checked Load and I selected the load that I created which is combination of gravity pressure and temperature. Do I need to check TEMP and select my thermal load?

 

2:

My second approach is this

I created a load collector with card image of load to combine my pressure and gravity. I entered 2 for the LOAD_Num_set. and I combined gravity and pressure.

For the loadsteps: type of analysis is linear static. I have checked SPC and selected constraint. I checked Load and I selected the load that I created which is combination of gravity and pressure. I checked TEMP and I selected thermal load.

 

I was wondering which one is right, 1 or 2?

 

I got this message when I run the model

 

*** WARNING: The amount of allocated memory exceeds available RAM - this

may cause significant slowing down of solution progress due to the swapping

out memory to the swap file. It is recommended to use out-of-core

solution to reduce memory requirements.

 

 NOTE # 1405

 Memory is being expanded from 8074 MB to 8884 MB.

 Estimated working storage was not enough for inserting the data block

 'iwrkset' (6 MB + 2 MB)

 In order that we may improve our memory estimates, it would be appreciated if

 you could email this information and your run command to hwsupport@altair.com.

 If it is possible, please also include input data file(s).

 

 ==== End of solver screen output ==== 

 

 

 ==== Job completed ==== 

 

 

I would appreciate if you help me.

Altair Forum User

Hi  mohajerb@uwindsor.ca

 

is performing a thermo-structural coupled analysis is your objective?

 

Please refer to the tutorial OS-1080: Coupled Linear Heat Transfer/Structure Analysis for coupled thermal structural analysis.

 

The proceudure to run a coupled thermal analysis is:

 

1) create a structural linear static subcase

2) create a heat transfer subcase and refer the 1st subcase under STATSUB in heat transfer subcase.