Structural Performance Simulation Of Superconducting Outsert In 40T Hybrid Magnet

The 40T hybrid magnet device is the most important device in the national "11th Five-Year" major science and technology infrastructure project-the steady state high magnetic field experimental device.Its construction provides a valuable high magnetic field platform for the advanced research of condensed matter physics,chemistry,material science,earth science,biology,life science and microgravity.It is also one of the important symbols of our country's high magnetic field level in the advanced ranks of the world.In this dissertation,the main components of the external superconducting magnet are simulated and analyzed by finite element simulation from mechanics,thermodynamics and electromagnetics.First,in this dissertation,the mechanical properties of armor and insulating materials in superconducting coils under three operating conditions are simulated and analyzed by 2D modeling,and the related criteria are checked according to the design criteria of ITER structure.The mechanical properties of the armor in superconducting magnets are analyzed by using the three dimensional modeling combined with the equivalent parameter prediction theory and the finite element analysis submodel method,and the results are compared with the two dimensional analysis results.Then,the thermal analysis and the mechanical analysis of the 80K thermal shield cooled by liquid nitrogen are carried out in this dissertation.The necessity of multilayer insulation on the thermal shield is discussed.Then through the finite element simulation analysis,the reason of the expansion and rupture of the inner cylinder of the oxygen free copper thermal shield during the test of the hybrid magnet in the extreme working condition is analyzed,and then the new thermal shield inner cylinder is redesigned and rechecked based on the analysis result.Finally,this dissertation simulates the interaction between the three of the superconducting magnets,the water-cooled magnets and the thermal shield inner cylinder in the process of the loss of the superconducting magnets by the method of voltage driven and electromotive force coupling and the non equal area current distribution method.The influence of the internal cooling screen on superconducting magnet and water-cooled magnet in the process of trip and quench is qualitatively explained.