d4.08.01 sd_macr_elem_stat data structure

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

• 1. SD in a few lines
• 2. Arborescence
• 3. Contents of objects
• 4. Example: SD_macr_elem_stats_1 from test SSLP100B