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  1. achilles03

    abaqus imperfection command don't function

    Is your .fil file in the same directory as the input file? Or do you have the .fil file open with another program?
  2. achilles03

    Abaqus Interaction, dont understand why this wont work

    Can you attach or post the step-definition part of your input file? (i.e. all the interactions, surface definitions, interaction definitions, etc). That might help us identify the problem. Dave
  3. achilles03

    Help determining the equivalent mechanical system for a filter?

    1 mass, 2 springs, 1 dashpot... that's 4 passive components.
  4. achilles03

    Help determining the equivalent mechanical system for a filter?

    Fantastic, thanks! I wrote a quick-check in Excel, and the math works out. Is this the response you'd expect for a square wave input close to the resonant frequency? Thanks again, Davehttp://files.engineering.com/getfile.aspx?folder=35902755-de9e-43bb-9acf-ce15422a49c2&file=pi_filter.xls
  5. achilles03

    Help determining the equivalent mechanical system for a filter?

    It looks like I was incorrect in calling it a Butterworth filter. It looks like this is a pi filter.
  6. achilles03

    Help determining the equivalent mechanical system for a filter?

    I'm a little rusty on my circuit analysis, so I was hoping someone more well-versed in circuit analysis could give me a little help in figuring out a filter I'm interested in. I believe it is a Butterworth filter. I'm a mechanical engineer, and it'd be easier to set up the differential...
  7. achilles03

    Crippling comparison: FEM vs. closed-form solution descrepancy

    I've done a parametric study of crippling of a plate simply supported on 3 edges with 1 free edge (the free edge is not a loaded edge), just like a typical flange. I've compared the results to a classical hand calc. The problem is that my FEM predictions (linear eigenvalue, Abaqus 6.7) are...

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