Stress analysis of cryogenic suspension system of superconducting MRI magnet cryostat

Support system is one of the most critical components of any zero boil off MRI cryostat. We have designed and analysed twelve self-centring support structures for the warm bore horizontal cryostat for testing of 1.5T superconducting MRI magnet. The design has been optimized to have maximum tensile strength, minimum resonant frequency, heat load, maximum pretension force and with allowable accelerations. The dimensional constraints as well as requirements for structural stability has been established. The s-glass support straps with intermediate thermal intercepts at 60–80K and has been designed to suspend the five tons cold mass during assembly, shipment and normal operation of the MRI magnet. This paper briefly discusses the static and dynamic stress simulation of cryogenic support link of the MRI cryostat using ANSYS.