Abstract:The China Fusion Engineering Test Reactor (CFETR) Central Solenoid Model Coil (CSMC) is being designed and fabricated by the Institute of Plasma Physics Chinese Academy of Sciences. In order to validate structure strength and reliability of the CS Model Coil, model analysis and seismic response analysis have been carried out. Firstly, the paper established the CFETR CSMC model by using the CATIA software. Then the natural frequencies and modes of the CSMC are obtained by modal analysis. On this basis, the single-point seismic response spectrum of the CSMC is analyzed. From the results of analysis, it is concluded that the destructive effect of the horizontal seismic wave is bigger than that of the vertical seismic wave for the CSMC. Finally, El Centro, a 7.1 magnitude seismic wave, is selected to conduct the time-history analysis of the CSMC. The results reflect the maximum displacement of the CSMC coil under seismic action occurs at about 1.9 s, and the maximum displacement is 7.10 mm, 4.14 mm and 0.04 mm, respectively. During the whole earthquake, the maximum shear stress of the CSMC coil part is 2.06 MPa, which is lower than the allowable shear stress of the insulation layer of 60MPa. The maximum displacement of the whole model coil under earthquake is 10.37 mm and the maximum equivalent stress is 138.0 MPa. Our analysis results show that the design of the CSMC meets the design criteria.
Keywords: CFETR CSMC; Seismic spectrum analysis; Time history analysis