modifying the model between two analyses
modifying the model between two analyses
(OP)
I need to modify one element between two static steps.
Since EMODIF can be used only with a PREP7 I have to solve the first step, enter prep and modify the element, reenter again SOLU. In this way the results of the first solu are cancelled.
1- How can I impose the time running from 0 to 1 for the first solu and from 1 to 2 for the second solu?
2- I use SSTIF to maintain the structural information between the two solve, but how can I retrieve the results for the first solu?
andrea
Since EMODIF can be used only with a PREP7 I have to solve the first step, enter prep and modify the element, reenter again SOLU. In this way the results of the first solu are cancelled.
1- How can I impose the time running from 0 to 1 for the first solu and from 1 to 2 for the second solu?
2- I use SSTIF to maintain the structural information between the two solve, but how can I retrieve the results for the first solu?
andrea
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Andrea Mordini, Civil Engineer, Ph.D.
http://www.andreamordini.com
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RE: modifying the model between two analyses
after the first run with ANTYPE,STATIC you can FINIsh and enter /PREP7, then re-enter /SOLU but, instead of doing a SOLVE, first set ANTYPE,RESTART. Then set TIME,2 etc. This will "append" your new calculation to the rst file as a new loadstep.
Regards
RE: modifying the model between two analyses
In any case, I solve the problem as reported below.
Thanks, cbrn, you showed me the right direction!
andrea
/SOLU
ANTYPE, STATIC
RESCONTROL, , NONE ! the rdb file is not written
EMATWRITE, YES ! the emat file is written
TIME, 1
SSTIF, ON
OUTRES, ALL, ALL
...
ALLSEL
SOLVE
SAVE$FINISH
! ---------------------------------
/PREP7
... element modification
ALLSEL$SAVE$FINISH
! ---------------------------------
/SOLU
ANTYPE, STATIC, REST
TIME, 2
SSTIF, ON
OUTRES, ALL, ALL
...
ALLSEL
SOLVE
SAVE$FINISH
-------------------------------------------
Andrea Mordini, Civil Engineer, Ph.D.
http://www.andreamordini.com
-------------------------------------------