Multiphysics analysis of operational stresses in a 1.5 T MRI magnet

Actively shielded magnets such as MRI magnets experience high operational stress due to various forces acting on it.An accurate prediction of the various stresses during operation and its effect on the final magnetic field is crucial for the proper design of an MRI system. In this paper, the contribution of different forces in the final operational condition of the magnet is discussed. Based on thesimulations, the required winding stress for each coil is estimated. In cases where winding stress alone cannot manage the magnetic stresses, over-binding is also provided to nullify the effects of stresses due to the higher Lorentz forces.