Finite Element Method is used in this article to analyze the stress of CR superferric magnet.Magnetic force and the stress caused by this force are calculated.The thermal stress and strain of the coil caused by cooling down is also analyzed.The result will be taken as a check for the design of the coil and coilcase,and also as a reference for the optimization of further design and quench protection.
The CR superconducting magnet is a dipole of the FAIR project of GSI in Germany.The quench of the strand is simulated using FEM software ANSYS.From the simulation,the quench propagation can be visualized. Programming with APDL,the value of propagation velocity of normal zone is calculated.Also the voltage increasing over time of the strand is computed and pictured.Furthermore,the Minimum Propagation Zone(MPZ)is studied. At last,the relation between the current and the propagation velocity of normal zone,and the influence of initial temperature on quench propagation are studied.
