Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

  • Congratulations IDS on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

Search results for query: *

  1. lawful

    Efficient way to extract eigenvalues/eigenvector matrices

    Abaqus performs the calculations just fine, but I need eigenvalues and (mass scaled) eigenvectors to perform some other calculations. I am doing this because I could not find an efficient way to export eigenvalues and eigenvectors in a readily digestible format. Thus, the question. Thank you...
  2. lawful

    Efficient way to extract eigenvalues/eigenvector matrices

    Greetings, I am working with large Abaqus model and I need to extract its eigenquantities and import them into MATLAB. Is there an efficient way to do this? So far I have extracted the Mass and Stiffness matrices (keywords *MATRIX GENERATE and *MATRIX OUTPUT), imported them into MATLAB (via...
  3. lawful

    Stepped sine simulation on nonlinear component

    with swept sine excitation the response may be corrupted by transients. The stepped sine excitation is more conservative in this sense - I could stitch together several sinewaves to create a discrete-swept-sine excitation though. My problem is that either way it would take just too long to...
  4. lawful

    Stepped sine simulation on nonlinear component

    Hello, I have a structure with a lap joint which I tested at different forces and found being nonlinear (stepped sine excitation revealed softening behaviour in the FRF). Now I would like to be able to predict the forced response of my FEmodel** by extracting the very same FRF I extracted via...

Part and Inventory Search