Abstract: Large vacuum containers are required in modern large science projects, but the design of large vacuum containers needs to consider various factors. It is an important scientific issue how to design large vacuum containers. We designed and analyzed a large-scale horizontal vacuum container in this paper. And the vacuum containers with an inner diameter of 5 m and a length of 6 m were designed, which had many large square flanges. The finite element analysis software, ANSYS-Workbench was used for the analysis, which obtained the stress and deformation distribution of vacuum container under the working condition. And then the structure was optimized and the stability was analyzed. The analysis results show that the design is reasonable and feasible.

Key words: vacuum container, finite element analysis, stress, deformation, instability