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  1. stjc

    Buckling cellular structures - negative eigenvalues

    I'm investigating buckling of cellular structures and started off with a simple two-cell case which worked as expected. I've started effectively building up combinations of these two cell units but even by the time I get to a six-cell structure I get negative eigenvalue results. Whenever this...
  2. stjc

    Displacement output from buckle step

    I'm doing an eignenvector buckling analysis for a box girder bridge and am using the buckle linear perturbation load. The displacements for the deformations all come out as fractions of the maximum. How do I find the actual displacements? Thanks.

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