Learning Forum

[SofiK]

Hello,

I'm trying to extract the participation factors of a structure as part of a modal analysis.

In the commands code, I create an array called "PF" of size [NumberOfModes x 7], which is used to store the frequency values and 6 participation factors (in each direction x,y,z,rotx,...) for all the modes that are needed.

When I open the results file I see that for all the modes, all the participation factors are stored only for the ROTZ direction regardless of the desired direction (x,y, etc...). The "PF" array contains [NumberOfModes x 1] frequencies, and [NumberOfModes x 6] which all contain the same Participation factors for ROTZ direction copied 6 times in a row.

How can I fix the problem?

If any additional information is needed please let me know.

The code I've been using is attached here:

NumberOfModes=500

/post1

ALLSEL

*DIM,PF,,NumberOfModes,7

*do,iMode,1,NumberOfModes,1

*get,PF(iMode,1),mode,iMode,FREQ,,,

*get,PF(iMode,2),mode,iMode,pfact,,DIREC,x

*get,PF(iMode,3),mode,iMode,pfact,,DIREC,y

*get,PF(iMode,4),mode,iMode,pfact,,DIREC,z

*get,PF(iMode,5),mode,iMode,pfact,,DIREC,ROTX

*get,PF(iMode,6),mode,iMode,pfact,,DIREC,ROTY

*get,PF(iMode,7),mode,iMode,pfact,,DIREC,ROTZ

*ENDDO

/OUTPUT,'C:UsersSofiDesktopWorkAnsys checkLPlateModalOutSelectedModesParticipationFactor','txt',,

*STATUS,PF 

/OUTPUT 

[ErKo]

This will do what you need (change the C: drive to whatever location you need):

*GET,nbmode,ACTIVE,0,SOLU,NCMSS
*DIM,PF,ARRAY,nbmode,6
*do,i,1,nbmode
SET,1,i
*GET,PF(i,1),MODE,i,PFACT,,DIREC,X
*GET,PF(i,2),MODE,i,PFACT,,DIREC,Y
*GET,PF(i,3),MODE,i,PFACT,,DIREC,Z
*GET,PF(i,4),MODE,i,PFACT,,DIREC,ROTX
*GET,PF(i,5),MODE,i,PFACT,,DIREC,ROTY
*GET,PF(i,6),MODE,i,PFACT,,DIREC,ROTZ
*enddo
*CFOPEN,ParticipationFactor,txt,'C:\\'
*VWRITE,PF(1,1),PF(1,2),PF(1,3),PF(1,4),PF(1,5),PF(1,6)
(6(' ',F10.5))
*CFCLOS

[SofiK]

I'm sorry but your proposed code gives exactly the same results. The results contain only the results for ROTZ direction.
Any other methods to try?

[ErKo]

So this code works - we have tried this and it works fine (used it for project work also and it works always) : see below.

[SofiK]

Can you maybe send me the beginning of your code to understand if I need to change something in the settings prior to your suggested part of the code?

[ErKo]

That is all the code that is inserted into a command object as shown:

[SofiK]

It worked once I cleared the generated results and restarted the analysis. I guess the software could not overwrite the results for some reason.
Thank you for your help!

[ErKo]

Very good.
Glad to be of help.

Erik