output eigenvalues

[giacomovincenzo]

Hi all!

Is it possible to output the eigenvalues of a structure in a file?

Thanks!!

[zvidrih]

sure, it is possible...

You can set the variable containing eigen values, then write it to text file.

-eg.

Code: Select all

# Eigen analysis. 
set lambda2 [eigen $no] 
set file [open "eigen.out" w] 
puts $file $lambda2 
close $file

The Eigen vectors can also be saved to text file using node recorder command...

Code: Select all

# Recorders for modes 
recorder Node -file Mode_$modeNumber.out -node  1 2 3 ... -dof 1 2 3 "eigen $modeNumber" 
analyze 1 

"For loop" can be used for convenience...

[giacomovincenzo]

Thanks zvidrih!!!!