Hello
The centre of gravity is not calculated automatically.
If you only need the center of mass, you can do an eigenvalue analysis. The result is the center of gravity due to the selfweight.
If you are only interested in the center of ‘mass’ for a given ‘storey’ then you can use the storey level functionality in DYNA. Please see the example in TEDDY and see the description in SOFIMSHC and DYNA manuals.
TEDDY > File > Examples > dyna > english > storeys > storeys.dat
Best regards
Frederik Höller
Your SOFiSTiK Support Team