![]() Included in the program is a parser for Microstran. The source code includes: frame analysis, LDL' decomposition, LU decomposition, Newton-Raphson iteration, sub-space iteration, Stodola iteration, Sturm eigenvalue check, static condensation, Guyan reduction, and dynamic condensation. It computes the static deflections, reactions, internal element forces, natural frequencies, mode shapesĪnd modal participation factors of two- and three- dimensional elastic structures using direct stiffness and mass assembly.įrame3DD has its own text-file input format (.3dd), but additionally supports matlab (.m) and spreadsheet (.csv) file formats, and offers graphical output including mode shape animation via Gnuplot version 4.6. ![]() Frame3DD is free open-source software for static and dynamic structural analysis of 2D and 3D frames and trusses with elastic and geometric stiffness. ![]()
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