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  1. New2FE

    Basics of FEA

    I found that starting with simple elements like beam elements helped understand the concept initially. I did a few calcs by hand (using stiffness matrices) and checked them against Nastran results for the same basic problem. Its fiddly but I learned a lot this way about the importance of a few...
  2. New2FE

    Working on a Book...Any Advice?

    I can totally recommend LaTeX, my wife looks great in it.
  3. New2FE

    Is the Grass Greener Elsewhere?

    Yes the grass is greener but its probably been painted.
  4. New2FE

    Enforced Displacement

    Hi! OK I worked it out. The modification to the force vector was tripping me up. Attached is my final spreadsheet. I was trying to basically represent the same problem two ways: applying a load to one end, or by enforcing a displacement that achives the same reactions. The spreadsheet isnt...
  5. New2FE

    Enforced Displacement

    Here attached is a spreadsheet I made to for this problem. The first worksheet "Displacements" uses excel to invert the assembled stiffness matrix and solve for given load (-35000N). I remove column and rows by replacing the stiffness terms (for zero displacement DOF) with zeros except for the...
  6. New2FE

    Enforced Displacement

    Hello, unfortutely my book doesnt have an enforced displacement example. I tried partitioning the matrix as you described, but I dont seem to get the right answer. I am doing it wrong, I think, is it right to remove rows and columns associated with DOF that have no enforced displacement? In...
  7. New2FE

    Enforced Displacement

    Hello anyone Im new to FEA and I am trying to work a few things out. I understand that when you know what your applied loads are, and F=KX, the displacement can be calculated using KinverseF=X applied to a reduced stiffness matrix (where zero displacements are 'eliminated' from the stiffness...

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