Finite elements analysis of the CMS feet

The aim of this analysis is to cross-check the mechanical behavior of the CMS support feet with the F.E. program ANSYS 5.4. A previous analysis has been carried out with CASTEM 2000 by Hubert Gerwig, determining the actual design. The operating conditions are the normal position with the detector closed and the moving position, while the rings of the detector are opened. For these scenarios, the deformations and stresses have been calculated. The results obtained show that the displacements and deformations are negligible and the stresses are within the safety limits. An additional 15% lateral acceleration and 15% vertical acceleration have also been taken into account, to check if the feet withstand an earthquake.