extracting results from transient structural analysis ansys workbench

[mayakuntla92]

i want to extract nodal velocities at some nodes at all time steps (transient) to csv or dat format directly. i have written this code
SET,LIST
*DIM,VELY,ARRAY,3125,800 !!!!! FOR 800 NODES AT 3125 TIME STEPS
NODENUMBER=141475 ! INITIAL NODE NUMBER
*CFOPEN,VEL,CSV
*DO,KK,1,800,1
*GET,VELY(1,KK),NODE,NODENUMBER,V,Y
*VWRITE,VELY(1)
(E15.8)
NODENUMBER=NODENUMBER+1
*ENDDO
*CFCLOSE

still i am unable to extract results?? any help

 

[jkupka84]

Hello,
have you tried something like this (only for the last time step)

*GET,NCOUNT,NODE,,COUNT              ! Get total number of selected nodes
*DIM,VELY,ARRAY,NCOUNT,1             ! Create NCOUNT x 1 array 
/POST1
SET,LAST
*CFOPEN,VEL,CSV                      ! Create file called vel.csv
*VGET,VELY(1,1),NODE,1,V,Y           ! Fill first column with vy
*VWRITE,VELY(1,1)                    ! Write one column to file
(E13.5)                              ! Format with scientific
*CFCLOSE

 

[Erik Panos Kostson]

Think it is not easy this - how you going to distinguish when one node history stops and the next starts.

The normal thing is ti generate a time history file for every node. Thus if we have 200 nodes, we generate 200 files.
That can be read in automatically in in a small script. One can also append it to the same file using the append option in cfopen.

I have not managed to do this 100%, but have a go and see if you can get it to work:

/PREP7  
!*  
ET,1,BEAM188
!*  
!*  
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,DENS,1,,7800 
MPTEMP,,,,,,,,  
MPTEMP,1,0  
MPDATA,EX,1,,200E9  
MPDATA,PRXY,1,,0.3  
SECTYPE,   1, BEAM, RECT, , 0   
SECOFFSET, CENT 
SECDATA,0.1,0.1,0,0,0,0,0,0,0,0,0,0 
K,1,0,0,0   
K,2,2,0,0   
L,1,2   
LESIZE,ALL,0.1  
LMESH,ALL
FINISH  
/SOL
D,1, ,0, , , ,ALL, , , , , 
F,2,FY,-1000 
!*  
ANTYPE,4
!*  
TRNOPT,FULL 
LUMPM,0 
!*  
DELTIM,0.1,0.1,0.1  
OUTRES,ERASE
OUTRES,ALL,ALL  
AUTOTS,1
ALPHAD,0.11 
BETAD,0.00025   
KBC,1.0 
TIME,2  
TIMINT,1
SOLVE
/POST26
/NERR,2000
*get,ncount2,node,,count
*do,i,1,ncount2,1
NSOL,5,i,V,Y,
STORE,MERGE
*GET,size,VARI,,NSETS
*DIM,VEL,ARRAY,size 
VGET,VEL(1),5
a='filev'
b=CHRVAL(i)
c=STRCAT(a,b)
*CFOPEN,c,dat         ! If appending, just use one file name, say a and use append so: *CFOPEN,a,dat,,append 
*VWRITE,VEL(1)        ! Write array in given format to 
%14.5G 
*CFCLOSE
*DEL,ALL
*enddo

 

[mayakuntla92]

Thanks for the reply guys.

https://www.eng-tips.com/userinfo.cfm?member=jkupka84

Dear jkupka84,

just now I executed your code for postprocessing. there were no errors. thanks for your code. your code is writing velocity in y-direction for node number 1 at last time step successfully.

how to write at all time steps???
set,last --- gives only at last time step

 

[jkupka84]

Hello,
from the scratch try something like this

/POST1
SET,LAST                             ! Read the last data set

*GET,NCOUNT,NODE,,COUNT              ! Get total number of selected nodes
*GET,NTIME,ACTIVE,0,SET,LSTP         ! Get last data set number
*DIM,VELY,ARRAY,NCOUNT,NTIME         ! Create NCOUNT x NTIME array

*DO,i,1,NTIME                        ! Do-loop over NTIME
 SET,i                               ! Read the i data set
 *VGET,VELY(1,i),NODE,1,V,Y          ! Fill first column with vy
*ENDDO
*MWRITE,VELY,VEL,CSV,,JIK            ! Writes a matrix to a csv file in formatted sequence as NCOUNT rows and NTIME columns
(xxE13.5)                            ! Format with scientific where xx is NTIME scalar parameter which you have to change manually

I don't know if is possible to do it without hard coding of xx. Maybe do-loop of each matrix element separately.