关键词: 托卡马克, 气体注入系统, 有限元方法, 结构优化

Abstract:  Based on the finite element analysis method, in order to meet the relevant design criteria of ITER, the optimization design of the injection pipeline is carried out as an attempt for ITER gas injection system. The analysis results show that the pipeline flexibility is not effectively limited. Setting additional supports are needed on these positions with large deformation. The structure of the injection pipeline is optimized, and the analysis results show that there is no significant increase of secondary stresses while limiting the pipeline flexibility, and there is no plastic collapse, local failure and ratcheting. Meanwhile, the reaction force of pipeline is reduced by 33% on the auxiliary support. The structure optimization scheme is verified, and the reliability and safety of pipeline structure are improved. 

Key words: Tokamak, Gas injection system, Finite element method, Structure optimization