Mechanical analysis of Magnetic Field Applied Czochralski Method (MCZ )superconducting magnet cold mass suspension tie rod structure

Abstract

Abstract A Carbon Fiber Reinforced Polymer/Plastic CFRP rod assembly used for the 4K cold mass suspension of an MCZ magnet was presented in this article. Finite element simulation and theoretical calculations were employed to explore the patterns of electromagnetic forces and torque variations on the carbon steel magnetic shield due to changes in orientation within a gradient magnetic field. The bolt pre-tensioning force and cryogenic contraction force were also calculated. Taking into consideration scenarios that may occur in its working environment, the effects of electromagnetic forces, cryogenic stresses, gravity, transport impact accelerations, and other factors on the entire cold mass suspension structure, which includes the rod assembly and main coil frame, were discussed. The assessment aims to determine whether the structural integrity meets the requirements for use. The calculations indicated that the strength of the rod assembly structure of this model could meet the assumed usage requirements and does not exceed 50% of its rated load.