Hi

Have you already find the matrix with the eigenvectors? I am searching it

Kind regards

Hi, u could just type at the end of the input file, below the step command, the bolted command. And the eigenvector matrix will be inside the .dat file.

** STEP: ModalAn

**

*Step, name=ModalAn, nlgeom=NO, perturbation

*Frequency, eigensolver=Lanczos, acoustic coupling=on, normalization=displacement

, , 80., , ,

**

** OUTPUT REQUESTS

*Node print

U

**

*Restart, write, frequency=0

**

** FIELD OUTPUT: F-Output-2

**

*Output, field, variable=PRESELECT

*End Step

Thank you very much!

If i create a nset can i get it's eigenvector matrix?

*Node, nset=erqi2 print

U

I haven't search it that much, but it seems right what u suggested

Thank you ! I'll try.

Hi, its the syntax of abaqus input

Results/

ODB history output

then choose what you want