Comparison of FEA Calculations with Cryostat Dummy Weight Test Results

Extensive Finite Element analyses were performed to determine the loads and stresses acting on the EB and Barrel during assembly and in its final configuration. Up to now it has been difficult to verify the FEA results due to the unusual compression at the inner radius shims has resulted in larger than anticipated deflections. The cryostat dummy load test offers the first real chance for a direct comparison between the deflections of the Tilecal and the FEA model. By comparing the difference in position of the FM's before the cryostat load was applied and afterwards it is possible to eliminate all other variables and compare directly with the FEA model. This paper will present a comparison between the FEA model and the survey measurements for when the cryostat dummy weight load was applied at 32 modules and 46 modules in place.