Finite Element Modeling And Multi Physical Field Analysis Of CFETR Cryostat Thermal Shield

In order to deal with the increasingly severe energy crisis,researchers proposed a method of using fusion reactors to generate electricity.CFETR(China Fusion Engineering Test Reactor),as an independent nuclear fusion reactor in china,has been emerged.Cryostat thermal shield of CFETR is responsible for reducing the heat load from high-temperature components to low-temperature superconducting magnet,and it provides operation channel for corresponding maintenance operation.As a key component.cryostat thermal shield must be able to maintain low temperature environment and enough strength.The paper introduced the energy development mode and the energy problems faced by human beings.The development history of the international thermonuclear reactor was presented.The location and function of the main components of CFETR were introduced.According to the idea of modular modeling,the process of using CATIA to model the structure of cryostat thermal shield and its accessories was described in detail.The material selection of cryostat thermal shield panel and support was determined.The corresponding material stress criterion was obtained.The thermal analysis of cryostat thermal shield was carried out in this paper.Using the finite element method,the finite element analysis model of cryostat thermal shield panel was established,and the heat radiation and heat transfer mode of cryostat thermal shield was determined.The maximum temperature of the cooling panel was 86.634k and the maximum pressure difference between the inlet and the outlet was 0.005MPa,which meets the design requirements and verifies the rationality of the cooling pipe layout.According to the structural characteristics of the cryostat thermal shield,the static analysis of the cryostat thermal shield was carried out by using workbench,and the stress distribution and deformation of the cryostat thermal shield under gravity and gravity earthquake coupling conditions were obtainedThis paper focused on the research of the influence of magnet system and electromagnetic field in plasma on the structure of cryostat thermal shield.Based on the basic theory of electromagnetic field and Maxwell electromagnetic analysis software,the finite element model of cryostat thermal shield electromagnetic analysis was established.The variation of magnetic field strength,magnetic induction strength and eddy current density on cryostat thermal shield were studied under the condition of linear 36ms attenuation of plasma.The electromagnetic force loaded on cryostat thermal shield was obtained.The workbench was used to analyze the stress distribution and displacement change of cryostat thermal shield under the coupling condition of electromagnetic force and gravity.The maximum stress of cryostat thermal shield was 57.694MPa and the maximum deformation was 12.475mm,meeting the design requirements.The analysis results will provide important references for the structure optimization and in-depth research of cryostat thermal shieldFigure[76]table[19]reference[87]...