Research On The Numerical Simulation Of Superconducting Magnet Stress Based On ANSYS

With the unusual characters of superconductivity technology, superconducting magnet has been widely used in physics, chemistry, and biomedicine and other research fields. The running current density of the superconducting magnet is dozens of times than the conventional magnet. The superconducting magnet could produce very high magnetic field, the magnet internal stress is huge. As the scale of the superconducting magnet is getting bigger and bigger, the stress computation of structural mechanics in the magnet design is become more and more important.This paper presents the numerical analysis and simulation result of the experimental superconducting magnet stress.Firstly, based on the Maxwell equations, the magnetic field of the superconducting solenoid magnet is computed by the magnetic vector method. Then the isotropy and anisotropy model of the solenoid stress analysis is established. This paper introduces the finite element method and software ANSYS, including its function, characteristic, and framework. It has some advantage in the simulation computation softwares. The coupling function of the ANSYS is analyzed, and it is achieved in the superconducting magnet stress analysis.With the experimental superconducting magnet, the stress and strain distribution of the magnet is simulated. The loop stress, radial stress and chief stress of the magnet are obtained. The result indicates that the stress value doesn't excess the extremum of the allowable when the magnet runs with the design current. The structural mechanics is steady and safety. Then changing the load of the magnet, the most value of the running current is worked out. It is provided a safeguard for the magnet running.Finally, by changing the magnet wall thickness, the influence of the thickness on the magnet stress is obtained. The result indicates that the stress of the magnet would increase when the thickness became big, and the damage of the magnet is got easily. It is indicated that thin wall coil has a better mechanical stability than thick wall coil. This paper analyses the superconducting magnet reinforcement and proposes the available methods.