Hello everybody
I'm performing a successive modal analysis using APDL (n times), at the end of every analysis i need to save modal frequencies in a table by APDL commands. So i want to fill the table with n number of columns and get the full matrix at the end of the analysis.
Please, is there anyone who can help?
kind regards
Hi
Please provide a detailabout your work to be able helping you.
what do you mean by modal Analysis with time there is no such thing ?
Dear Sir.
Please contacte my freind Dr. dahmane Mouloud for your problem.
Best regards.
Thanks all of you colleagues
Mr Kouider Bendine Im traying to plot the phononic crystal bandgap of a cubic square with a cylindrical hole inside it, so i need to change the boundary conditions (Floquet boundary conditions) many times (lets say 100 times) and do modal analysis every time to extract modal frequencies. In fact, i need a matrix of 100 column to be filled with the frequensies every time and since im not very familiar with APDL commands i dont know how to get all the frequencies in a file at the end of my analysis. I'll grateful if anyone could help.
kind regards.
Mr Nils Wagner,
thank's for your reply, here are joined the cdb file and the file for solution commands.
kind regards
Laidoudi Farouk Thank you for sharing the .cdb file.
Please, can you explain the meaning of
TB,ANEL, 1, 1,, 0
TBTEM, 0.00000000 , 1
TBDAT, 1, 2.802000000E+11, 1.142000000E+11, 1.142000000E+11
TBDAT, 4, 0.00000000 , 0.00000000 , 0.00000000
TBDAT, 7, 2.802000000E+11, 1.142000000E+11, 0.00000000
TBDAT, 10, 0.00000000 , 0.00000000 , 2.802000000E+11
TBDAT, 13, 0.00000000 , 0.00000000 , 0.00000000
TBDAT, 16, 8.290000000E+10, 0.00000000 , 0.00000000
TBDAT, 19, 8.290000000E+10, 0.00000000 , 8.290000000E+10
It seems to be an anisotropic material. What is the order of the 21 coefficients of the material matrix ?
Laidoudi Farouk
sorry for the late reply, to create a matrix u need just to give the dimension via the *Dim command and then with the help of the *set command you can fill it. if you wont to get the frequency for each iteration i think it is better to write it in a text file
i would do somethg like that inside your loop a macro file
*CFOPEN,strcat(chrval(Iter),'Modal'),txt,' '
/SOLU
ANTYPE,MODAL ! Modal analysis
nmodes = 4
modopt,LANB,nmodes ! Block Lanczos solver
mxpand,nmodes,,,yes ! Calculate element results and
SOLVE
*get,freq,mode,1,freq
FINISH
*VWRITE,freq
%0.0f
*ENDDO
*cfclos
Hope this helps
Mr Nils,
The TB, ...... and the followed lines represent the table of anisotropic material data, i got it from filling the table in APDL GUI forma, then i copy the table commands from the text file in the same folder.
Mr Kouider, lets say i want To repeat your example many times (n =100)
Using you commands is To obtain only one column when i need to save a number n of columns
Laidoudi Farouk Can you share a screenshot of the GUI illustrating the 21 coefficients?
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