RT Journal Article
SR Electronic
A1 Wang, Xianewei
A1 Zhao, Haikuo
A1 Xie, Fei
A1 Li, Chenyang
A1 Li, Xiulian
T1 The Mechanical Analyses and Structural Optimization of CSMC Preload System under Multi-load Cases
JF Manufacturing Technology Journal
YR 2023
VO 23
IS 5
SP 732
OP 738
DO 10.21062/mft.2023.075
UL https://journalmt.com/artkey/mft-202305-0010.php
AB In order to accumulate experience in the design and manufacturing of the toroidal field coils for the China Fusion Engineering Test Reactor, a model coil of mixed Nb3Sn-NbTi superconducting magnet with a maximum magnetic field variation rate of 1.5 T/s has been developed at the Institute of Plasma Physics, Chinese Academy of Sciences. The preload system, as one of the key components of the model coil, plays a crucial role in maintaining the overall integrity and stability of the model coil. First the magnetic field and electromagnetic forces of the model coil under extreme conditions are calculated based on Maxwell's equations. Then, the mechanical performance of the model coil at room and cryogenic temperatures is analyzed. To addressing the issue of excessive stress in the preload components of the model coil under preload, several optimization design schemes are proposed and iteratively analyzed. Finally, stress linearization is performed, and stress evaluation is conducted based on the analytical design. The assessment results indicate that certain optimization schemes enable the preload components to fully meet the operational requirements at both room and cryogenic temperatures. The outcomes presented in the paper will provide reference for the subsequent design and manufacturing of the central solenoid coil.