| PF1in-cryostat-feeder support for ITER poloidal field is an important part of the whole ITER feeder system. The finite element model is established by CATIA and ANSYS Workbench software in this paper, and the strength design, stability analysis and dynamic simulation also are completed. The reasonable design scheme finally is obtained by the analysis of results and limit stress evaluation criteria. The main research contents are as follows.(1) The structural design of PF1in-cryostat-feeder support for ITER poloidal field is finished. The material is selected by low temperature design criteria and mechanical design guidelines. The mechanical requirements of the poloidal field PF1feeder support, position requirements and three kinds of possible conditions are analyzed. It is to design the structure of the supporting frame and a fastener feeder support, and to establish the geometric model using CATIA software.(2) Based on load conditions of the poloidal field PF1feeder support received in these state when the feeder system shutdown, cooling and running,the static analysis on a variety of conditions of the poloidal field PF1feeder support structure is used by ANSYS Workbench software. All the maximum stress values under various working conditions support structure are calculated, and strength checking is made according to the stress limit evaluation criteria.(3) Due to ITER poloidal field PF1feeder support is a sheet structure design, its instability theoretical and thin plate buckling characteristics are firstly studied, and then stability analysis (eigenvalue buckling analysis) is used by ANSYS Workbench software, the buckling load factors are found out. According to the results of numerical simulation, the stability of the support structure is determined.(4) According to the design specifications of the ITER project, the impact of the earthquake on the poloidal field PF1feeder support is researched. Through modal analysis, the structure of the first order natural frequencies and mode shapes is obtained. In the X, Y, and Z directions, the ITER requirements SDD spectrum incentive is applied to poloidal field PF1within feeder support model, and the stress cloud and displacement of the response to the earthquake spectrum contour are obtained. By the results of analysis, the value of the maximum stress response in each direction of the maximum stress and job status are less than the allowable stress. Therefore, within this paper, the design of the feeder support in the course of their work will not be destroyed by the earthquake. |
