Analysis of barrel support saddles and forces between modules during assembly.

Guarino, V. J. ; Physics, High Energy

Argonne National Laboratory

关键词: Calorimeters;    43 Particle Accelerators;    Stress Analysis;    Cern;    Fabrication;   

DOI  :  10.2172/964246
RP-ID  :  ANL-HEP-TR-07-10
RP-ID  :  DE-AC02-06CH11357
RP-ID  :  964246

美国|其它

来源: UNT Digital Library

【 摘 要 】

As the Barrel Tile Calorimeter is constructed, the support saddles and the modules will be subjected to different forces, stresses, and deflections than when completely assembled. The purpose of this analysis is to examine the forces, stresses, and deflections acting on the support saddles and modules at various stages of assembly. The nominal weight of a barrel module is 20 tons. CERN Document number ATL-LB-EA-0001 'Summary of the Structural Analysis of the Barrel Support Saddles' describes in detail the structural analysis of the saddles and the completed barrel assembly. These calculations followed Eurocode 3. This paper examined several load cases which occur during the assembly of the Barrel. The following are the main conclusions: (1) The assembly is not stable until 18 modules are in place, and only then can the support cradle be removed; (2) The forces between modules are nominal and are far less that the forces in the completed cylinder with 64 modules in place and the cryostat load applied; (3) All of the stresses in the connections between modules are within acceptable limits; and (4) The interface between the cryostat supports and the cryostat move approximately 1.0 mm in the X and Y directions when the load of the cryostat is transferred to the Barrel.