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Recent content by Sbrabra

  1. Sbrabra

    Apply SURFACE TRACTION load, projected along direction (snow, wind...)

    Hello, I'm dealing with masonry vaults design and I'm trying to apply a distributed load on vault complex external surface, whose Z-PROJECTED magnitude is known in therms of kN/m^2. The point is: how to define a surface load on a curved shell, knowing its PROJECTED magnitude in Z direction, as...
  2. Sbrabra

    Modal dynamic and dashpots

    Hi all. I have to analyze the dynamic of a structure with dashpots, and I need to use modal superposition (the problem is linear and very large). The problem is that dashpots do not affect the result in this analysis type: ABAQUS is able to extract the undamped modes and to calculate the...
  3. Sbrabra

    About memory allocation for Abaqus

    Hi all. I want to upgrade my workstation, but I need some information about how different OSs allocate memory, just to avoid useless money efforts... Are the following considetaions correct? 1) Windows 32bit + just one 32or64 bit processor => max memory available for a single process = 2...
  4. Sbrabra

    Eigenvalues extraction - Lanczos method

    Tnx for your answer. Some considerations on the following analysis (Run A is the one I described in the previous post): - Run A: *Lanczos method settings: Requested all eigenvalues in frequency range [0, 50] Hz *Requested memory (from .dat file): 1.95 Gb *225 eigenvalues correctly found, but...
  5. Sbrabra

    Eigenvalues extraction - Lanczos method

    Hi all. I have a problem during a large eigenvalue extraction (natural frequencies) using the Lanczos method. The model has about 700.000 unrestrained DOF, and I requested all the eigenvalues under 50 Hz (which means about 200 eigenvectors to be found). The minimum memory required, as written...

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