Translation of geometric models ArchiCAD-Patran

For analysis of the geodesic shell for strength and stability, modern powerful FEM software systems (Patran/Nastran) can be used. However, this requires the conversion of the geometric model of the shell into a format that Patran/Nastran can understand.
Therefore, special translators were developed that convert a geometric model from the ArchiCAD program into a geometric model in the format of Patran/Nastran. This program performs the following functions: creating a geometric model based on the original geometric model from the ArchiCAD program (ArchiCAD - obj file), creating a file containing the geometric model in the Patran database format (Translator - ses file).
An OBJ file consists of a sequence of polygons separated by spaces. All lines ends with eof symbol. Each polygon consists of a sequence of vertex numbers separated by spaces. The vertex number refers to its X, Y, Z coordinates in Cartesian coordinate system. The required output file must contain calls to the Patran Command Language (PCL) functions that generate the corresponding surfaces.

Graphical user interface translator
Graphical user interface translator v 1
Class I1; 3. Six triangles are connected by six edges.
ArchiCAD In ArchiCAD.
Patran In Patran.

The translator of the double-contour geodesic shells translator v 2 was also developed. It accepts a geometric model of a double-contour geodesic dome with plates and rods, and create session file Patran for generating a model of a double-contour geodesic dome.
To ensure the translation of double-contour geodesic shells from ArchiCAD to Patran, variants of parametric objects were developed, in which the rods are represented by the operators of the GDL slab (A - options for analysis). Parametric objects in which the rods are represented by lin_ operators are suitable for design.