3-D stress analysis of the TPX toroidal field coil support structure

摘要

A 3-D, coupled, electromagnetic and stress analysis of the Tokamak Physics Experiment (TPX) toroidal field (TF) coil support structure is presented. The analysis makes use of one-eighth toroidal symmetry to simulate the magnetic field and structural characteristics of the superconducting TF and poloidal field (PF) coil systems. Notable extensions to past work include the addition of the PF coil set and the coupled electromagnetic and structural solution technique. In this analysis, the PF coils are included in the magnetic field calculations and attached to the TF cell structure to simulate the appropriate structural interaction. The effects of attaching the PF ring coils directly to the TF coil cases, with no provisions for free radial relative motion, are evaluated and discussed. The effects of various PF coil operation points are also discussed. Stress results are compared to the TPX structural design criteria to evaluate the general adequacy of the overall design.