Learning Forum

[Dawid Lewna]

Good morning everyone.

I hope I have chosen the right section, if not then please correct me.

I am looking for an expert who is well versed in writing scripts in APDL inside Workbench. I'm doing a thermal-structural analysis and have encountered the following problem. I have a temperature distribution from the "transient thermal" modules. I imported the result of the last calculation step into the "transient structural" module. Inside the "transient structural" module, I want to divide the finite elements into groups according to what temperature they have. To do this, I wrote APDL code that looks like the following (this is a piece of code that later based on the groups assigns them the appropriate critical value and kills the elements):

group1=0
group2=0
group3=0
group4=0
group5=0
group6=0
group7=0

*get, NUMELEM, ELEM, 0, COUNT

*do, i, 1, NUMELEM
  *get, temp_val, elem, i, temp 

  ! Group 1
  *if, temp_val, le, 20
    *if, temp_val, gt, 0
      group1 = 1
    *endif

  ! Group 2
  *if, temp_val, le, 0
    *if, temp_val, gt, -40
      group2 = 1
    *endif

  ! Group 3
  *if, temp_val, le, -40
    *if, temp_val, gt, -60
      group3 = 1
    *endif

  ! Group 4
  *if, temp_val, le, -60
    *if, temp_val, gt, -100
      group4 = 1
    *endif

  ! Group 5
  *if, temp_val, le, -100
    *if, temp_val, gt, -130
      group5 = 1
    *endif

  ! Group 6
  *if, temp_val, le, -130
    *if, temp_val, gt, -160
      group6 = 1
    *endif

  ! Group 7
  *if, temp_val, le, -160
    group7 = 1
  *endif
*enddo

cmgroup,group1,1
cmgroup,group2,2
cmgroup,group3,3
cmgroup,group4,4
cmgroup,group5,5
cmgroup,group6,6
cmgroup,group7,7

I get the following error, which I can't solve myself:

"Unknown label in field 5 ( temp ) of *GET command.                     
  Line= *get, temp_val, elem, i, temp                                   
  The *GET command is ignored."

I'm hoping to find someone here who can help me fix it. 

[dlooman]

There is no *get of element temperature mentioned in the *get documentation.  It appears you would need to be in post1, create an element table for temp (etab,temp,temp) and then *get the etable item.  If you can't be in post1 when you issue these commands you could *get one of the nodes of the element and *get its temperature. 

Also, I'm pretty sure the *if command needs to end with then, *if, temp_val, le, 20,then.  You could replace the two *if commands with one:  *if, temp_val, le, 20,and,temp_val,gt,0,then