Learning Forum

[safiana]

Hi everyone,

I found an interesting content regarding reducing the size of .rst file in ANSYS APDL in the following link:

https://www.padtinc.com/blog/reducing-the-size-of-your-rst-file-outres-is-your-friend/

Let's say I have a model with a large number of elements and nodes. After the solution, I only care about stress changes at a small portion of the model. Now, I want to write a code similar to this website to reduce my .rst size as much as possible only for that small portion. I wrote a sample code at the end of this post. For example, I have a cantilever beam with a large number of nodes. It has 4 load step and for the final result, assume I only care about the deformation of the nodes that are located between z=180 to z=200. The first question arises in my code: if OUTRES has to be written before LSWRITE or after it? Because if I write it before LSWRITE, it will ignore my boundary conditions at z=0 and the solution is not what I want. Can anyone fix this code to reduce the .rst size?

/prep7  

et,3,186

MP,EX,1,2e5 

MP,PRXY,1,0.3  

MP,DENS,1,7.8e-9

MP,BETD,1,1e-4

BLC4,0,0,5,5,200

esize,0.5

vmesh,all

/solu

DA,1,all

ANTYPE,4 

TRNOPT,FULL 

TIMINT,ON,ALL

NSUBST,3,10,1

nsel,s,loc,z,180,200

esln,s

nsle,s

CM,nxtrnl,node

CM,extrnl,elem

OUTRES,erase

OUTRES,nsol,last,nxtrnl

time,1

DA,2,Uy,0.1

LSWRITE,1

time,2

DA,2,Uy,-0.1

LSWRITE,2

time,3

DA,2,Uy,0.05

LSWRITE,3

time,4

DA,2,Uy,-0.12

LSWRITE,4

allsel,all

LSSOLVE,1,4,1  

[dlooman]

It should be before the first lswrite command. Outres won't cause your boundary conditions applied with the DA command to be ignored if that's what you mean by z=0. Lswrite commands can be replaced with solve commands.