The SID file is generated in a two-steps process:
In the first step, a deformable body FEA model is reduced by ABAQUS into a dynamic super-element substructure and specific reduced data is written to an intermediate SIM file.
In the second step, the SIM file data is processed to generate all dynamics entities necessary for the reduced dynamic analysis and these entities are written to the SID file according to the SID format.
The OBJ file, containing a light version of the undeformed body boundary mesh, is generated according to the Wavefront format. This file , used for animation purposes, is read by MODELICA when displaying the dynamic response of the body, thus completing the flexible dynamic analysis process.