.. _D4.08.01:

**d4.08.01** sd_macr_elem_stat data structure
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**Summary:**

The sd_macr_elem_stat data structure represents a macro element that is statically substructured. A macro element is in a sense a finite element whose support mesh has any number of nodes. To "manufacture" it, we start from a finite element model and we "condense" it on some of these nodes (which we call "external"). This condensation takes place by eliminating the ddls carried by the internal nodes. This technique is described for example in the book by J-F. Imbert "Analysis of structures by finite elements" published by CEPADUES in 1991. At the end of this condensation, the macro element is represented by condensed matrices and charges. The matrices (stiffness, mass and damping) are full and symmetric in size nddle if nddle is the number of external ddls of the macroelement.

 **Table of Contents**




.. toctree::
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    self

.. toctree::
    :maxdepth: 2
    :numbered:

    La_SD_en_quelques_lignes
    Arborescence
    Contenu_des_objets
    Exemple___sd_macr_elem_statS_1_du_test_SSLP100B