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Visualizing structural matrices in ANSYS using APDL
  Aaron Acton (ANSYS, Inc.)
  "This article presents a method of visualizing structural matrices used in finite-element analysis using ANSYS and the ANSYS Parametric Design Language (APDL). The information is intended to provide some insight into the nature of structural matrices used in finite-element codes. Some terms used in sparse-matrix arithmetic are discussed, and methods for calculating certain quantities are provided. A test model is constructed to demonstrate how the stiff ness, mass, and damping matrices may be visualized for various systems. The eff ect of element shape, element type (including superelements), element reordering, and equation reordering on structural matrices is briefly investigated."
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